SPS is a Chevrolet Performance Authorized Reseller!

The LS engine swap scene for classic vehicles is booming right now in the hot rod world. Iconic rides like Chevy C10 pickups and vintage muscle cars are leading the charge, blending timeless style with cutting-edge performance.

Modern technology has made these swaps incredibly straightforward, with hundreds of dedicated components, complete kits, and plug-and-play solutions available from top brands like Chevrolet Performance, Concept One Pulleys, Tanks Inc, AFCO, RideTech, Holley, Dakota Digital, and others. You're truly only limited by your imagination—and your budget.

When executed properly, replacing an aging small-block (or big-block) with a modern LS engine delivers massive gains in:

• Performance — Instant torque, smoother power delivery, and far superior throttle response.
• Drivability — Better low-end manners, easier starting, and modern refinements that make long drives enjoyable.
• Fuel efficiency — Impressive mileage improvements over carbureted classics, especially on the highway.
• Reliability — These engines are built to last, with proven durability from millions of miles in trucks, cars, and daily drivers—often running 200,000+ miles with minimal issues.

At SPS, we stock a full range of crate engines to match your goals: naturally aspirated setups starting around 400 HP for reliable cruising, all the way up to street-friendly supercharged beasts cranking out 1,000 HP (or more) that still handle daily driving without drama.

Pair that with smart upgrades like modern brakes, suspension enhancements, and a solid transmission, and you've got a classic that's not just fun on the weekends—it's dependable enough to drive anywhere, anytime.

Ready to bring your classic back to life with modern muscle? Contact SPS today—we'll help you build the perfect LS swap setup tailored to your ride!

SPS offers a wide range of proven GM LS-series crate engines to fit every budget and performance goal—from reliable daily-driver swaps to tire-shredding monsters. These engines deliver modern efficiency, massive torque, and bulletproof reliability that old small-blocks simply can't match.

GM Automotive-Line Engines (GEN IV Car Platforms):

LS3 (6.2L) — Modern rectangle-port heads, ~430 hp factory; legendary for smooth power and high-rev capability.

LS7 (7.0L) — Hand-built beast with titanium rods/valves, ~505 hp; 427ci, naturally aspirated option for serious builds.

GM Performance Crate Engines: These turn-key options from Chevrolet Performance crank up the factory formulas with aggressive cams, better flowing components, and race-inspired tuning:

• LS3-based crates: LS376/480 (495 hp) and LS376/525 (525 hp) for naturally aspirated street/strip dominance. Along with our own variants producing the LS376/535 (535 hp) and LS376/560 (560 hp).
• LSx 376 — High-strength block ready for big power; perfect base for custom builds.
• LSx 454 — Massive displacement iron-block foundation for extreme naturally aspirated or boosted applications.
• Supercharged icons like the LSA (556–580 hp) for street-friendly forced induction; have sadly been discontinued but don't sweat it—SPS has you fully covered with superior custom supercharged builds that outperform and outlast the originals. We start with robust foundations like the proven LSA block (for that familiar architecture) or the ultra-strong RHS LS block(beefier for higher boost and abuse), then pair them with top-tier Whipple superchargers—known for massive airflow, efficient intercooling, and reliable street manners even at big power levels. These custom builds result in a reliable, tunable setup pushing 800-1,100 + hp.

SPS's in-house expertise means we handle everything—pulley sizing, fuel system upgrades, cooling, and dyno tuning—for a turn-key package that's built right and backed by real hot rod know-how.

Modern Induction Upgrades: Elevate the look and performance with our 8-Stack Fuel Injection systems—classic down-draft styling meets electronic precision for crisp throttle response and big power. Or go full show-car with the 8-Stack Cross-Ram setup: symmetrical beauty, improved airflow, and that unmistakable retro-modern vibe.

Whether you're aiming for reliable cruising, weekend warrior duties, or all-out performance, SPS has the perfect LS engine (or custom build) to transform your 69 Camaro, muscle car, or hot rod. Let's match your vision—reach out today and let's build something epic! 

Mount Kits & Installation Support – Bolt-In Simplicity for Your LS Restomod

When restomodding your classic with an LS engine and transmission, proper mounting is key to a clean, vibration-free install that preserves handling, alignment, and that factory-like feel. SPS offers an extensive lineup of vehicle-specific installation mount kits for both automatic and manual transmissions—designed exclusively for popular swaps into Chevy C10 pickups, classic muscle cars (Chevelle, Camaro, Nova, etc.), and other vintage GM platforms.

What Makes SPS Mount Kits Stand Out:

• Application-Specific Design — Each kit is engineered for your exact year/make/model (e.g.,1963–1972 C10, 1973–1987 square-body trucks, first-gen F-bodies, A-bodies, and more). No generic "universal" compromises—mounts bolt into factory holes where possible for a precise, hassle-free fit.

Complete Packages — Every kit includes: 

• New polyurethane or high-density rubber engine mounts (for reduced vibration and durability). 
• Heavy-duty frame brackets and clamshells. 
• Transmission crossmember (adjustable in many cases for perfect driveline angle and clearance). 
• Grade-8 hardware and all necessary brackets/hardware.

These kits replace your original (often worn-out) mounts and brackets entirely, making the engine/transmission drop-in straightforward.

A Note on Tunnel Modifications: In some applications—especially with larger transmissions like the 4L80E/4L85E and 6L80/6L90, the factory transmission tunnel may require minor modifications (clearancing, notching, or slight reshaping) for full clearance and proper shifter placement.

Pair your SPS engine/transmission combo with one of these mount kits, and you've got a rock-solid foundation. No guesswork, no cutting corners—just reliable, professional-grade support to make your restomod drive like a dream.

Let SPS match the perfect mount kit to your chassis and powertrain—contact us today and let's lock it down!

Engine Management & Wiring – Plug-and-Play Reliability

for Your LS/LT Swap

At SPS, we make engine management straightforward and

dependable—no guesswork, no endless wiring headaches. Every harness we

provide is custom-built specifically for your LS conversion’s chosen

engine and transmission combination. This ensures perfect fitment, clean

routing, and seamless integration into your classic muscle car, or hot rod.

Our Harness & Controller Options Include:

• 
  
• GM
• 
  
•     Factory-Style ECMs & TCMs
• 
  
•     We supply genuine GM Engine Control Modules (ECMs) and Transmission
• 
  
•     Control Modules (TCMs) matched to your crate engine (e.g., E38/T42
• 
  
•     for Gen IV LS). These come with custom programming tailored to
• 
  
•     your setup—optimized for performance, drivability, emissions delete (where
• 
  
•     legal), cam timing, torque management, and shift points. Simplified for
• 
  
•     swaps while retaining full diagnostics capabilities.
• 
  
• Full
• 
  
•     Diagnostic Capability
• 
  
•     Every SPS harness includes the Check Engine Light circuit and
• 
  
•     standard OBD-II diagnostic port (ALDL-style plug). Any shop with
• 
  
•     a basic OBD-II scanner can read/clear codes—no proprietary tools required
• 
  
•     for basic troubleshooting.
• 
  

Why SPS Engine Management Stands Out:

• 
  
• Tailored
• 
  
•     to Your Build — We match the harness, ECM/TCM (or standalone), and
• 
  
•     programming to your exact engine/trans combo, cam specs, throttle type
• 
  
•     (DBC/DBW), and goals (cruise, performance, or race). 
• 
  
• Swap-Friendly
• 
  
•     Design — Clean, labeled wiring with weatherproof connectors, minimal
• 
  
•     bulk, and provisions for gauges, fans, wideband O2, etc. 
• 
  
• Reliability
• 
  
•     & Support — Factory GM options keep it OEM-like and warrantied
• 
  
•     where applicable; aftermarket choices offer easier future tweaks. We
• 
  
•     handle initial programming and can guide remote tuning if needed.
• 
  

Aftermarket Standalones for Maximum Flexibility.

Holley Terminator X / Terminator X Max — Popular

plug-and-play EFI controllers with dedicated LS-specific harnesses. Features

real-time fuel learn, boost/nitrous control, programmable I/O (fans, etc.), and

built-in transmission control (on Max versions) for 4L60E through 6L80/90E.

Handheld tuning or laptop via software—ideal for carb-to-EFI conversions or

full standalone swaps. 

SPS delivers a complete, ready-to-run solution that fires

right up and drives like a modern vehicle in your classic shell.

Building your dream restomod? Tell us your engine/trans

details, and we'll spec the perfect management package—complete, programmed,

and ready to roll! 

Exhaust Options –Custom Headers for Optimal Fit & Performance

For most LS swaps—especially into tighter engine bays like narrow-frame Chevelles, Novas, Camaros, or lowered/hot-rodded classics—clearance issues quickly arise. Factory manifolds often sit too wide or low, interfering with steering shafts, motor mounts, frame rails, oil pans, or transmission bellhousings. That's where custom headers shine.

Why Custom Headers Are Usually the Way to Go:

• Superior Performance — Tubular headers improve exhaust scavenging (pulling exhaust out faster via tuned pulses), boosting horsepower (typically 15–40+ hp gains depending on setup), torque across the RPM band, throttle response, and even fuel efficiency under load.
• Better Sound — That classic hot rod rumble or aggressive bark you want—headers deliver a deeper, more defined exhaust note compared to restrictive manifolds.
• Clearance & Fitment — Vehicle-specific designs tuck tubes tight to the block, avoid ground-hanging issues (especially with air ride or lowered suspensions), and work around swap components like power steering steering boxes.

SPS Custom Header Choices:

We offer premium, swap-optimized headers in popular configurations to match your engine size, power level, and desired sound:

• Full-Length (Long-Tube) Headers — The top performer for maximum power, especially on boosted builds. Equal-length or stepped designs optimize scavenging for broad torque and high-RPM pull. Great for street/strip or high-hp setups (e.g., 1-3/4" to 1-7/8" primaries, 3" collectors). Brands like Hooker Blackheart, Hedman, and Ultimate Headers, offer excellent vehicle-specific options with proven fitment—no major frame notching required in many cases.
• Swept-Back (Mid-Length or Shorty-Style Variants) — A smart compromise for tighter clearances. These route tubes rearward (swept) for better ground clearance, easier install, and good low-to-mid torque gains without the full complexity of long-tubes. Ideal for lowered trucks, pro-touring muscle cars, or when you prioritize drivability over max peak hp.

Pro Tip for Your Build:

• Start with your chassis year/model—many swaps need headers designed for 2WD frames.
• Pair with our mount kits for perfect engine positioning.
• Factor in spark plug access (some tight headers require specific wires) and exhaust routing (X-pipe or H-pipe for balance).

Let's dial in the perfect setup for your hot rod or muscle car—reach out with your chassis details and we'll recommend the best match!