Build #1 Naturally Aspirated Delivered Completed December 2025

1966 CHEVY C10

"BIG BLOCK HEART, MODERN BONES"

Full frame swap onto a 2006 Tahoe chassis under a clean '66 cab — powered by a Blueprint Engines 427 LS7 putting 595 HP through a 4L80E. Triangulated 4-link with QA1 coilovers in back, Dakota Digital cluster, Vintage Air climate.

Pensacola, FL · Mad Labs Performance HQ · Dyno: Dynojet 224x
1966 Chevy C10
595
Peak RWHP
565
Peak RWTQ
6100
Peak RPM

Engine Dyno Sheet

HP & Torque vs RPM

Power and Torque Corrected to Standard Conditions
HP Torque (ft-lb)
Blueprint Engines · PSLS42730CTF · Measured at the flywheel · SAE Corrected · Open original sheet →
Published with the owner's permission. Dyno data shown with customer consent.

The Build

Engine
Engine Blueprint Engines LS 427 ProSeries — 625 HP Base Dressed, fuel-injected crate
Displacement 427 ci (7.0L)
Architecture GM-LS compatible aluminum block + heads
Camshaft Blueprint hydraulic roller (factory spec)
Heads CNC-ported aluminum (Blueprint ProSeries spec)
Induction Multi-port EFI
Headers JBA 1-7/8" long-tubes
Tune HP Tuners — Mad Labs in-house
Warranty Blueprint 30 mo / 50,000 mi
Drivetrain
Transmission GM 4L80E
Flywheel SFI-spec
Differential 2006 Tahoe GM 10-bolt LSD, 3.73 gear
Axles OEM
Suspension & Chassis
Front OEM Tahoe suspension
Rear Custom QA1 triangulated 4-link, coilover shocks
Chassis Full frame swap — 2006 Chevy Tahoe
Interior & Comfort
Gauges Dakota Digital cluster
Climate Vintage Air A/C
Pulleys CVF Racing serpentine system
Displacement
7.0L V8 (427 ci)
Induction
Naturally Aspirated
Fuel
Pump gas
Transmission
GM 4L80E

The Story

Jim Schafer's 1966 C10 is the first in a four-car collection we've built for him — the one that set the formula. Blueprint Engines 427 LS7 crate motor (the same ProSeries 7-liter that later went into his 1968 Camaro and 1972 Chevelle), dropped into a fully swapped chassis from a 2006 Chevy Tahoe. Modern frame, modern brakes, modern suspension, modern HVAC — vintage cab, vintage paint, vintage everything you can see.

Blueprint's own flywheel sheet on this engine (PSLS42730CTF) shows 595 HP near 6,100 RPM with a flat 565 ft-lb torque shelf from 4,800 to 5,800. Through the GM 4L80E transmission and out to the back tires of the truck, that translates to an honest, daily-driveable powerband that pulls hard off the line and never falls flat.

The chassis is where this build separates from his classics. QA1 triangulated 4-link with coilover shocks out back actually plants 595 horses — no wheel-hop, no axle-walk, just grip. Up front is the OEM Tahoe suspension geometry, dialed in. Brakes, steering, cooling — all 2006 truck underneath, all '66 truck on top.

Inside, a Dakota Digital cluster slips into the original dash like it was always there. Vintage Air climate makes a Pensacola July driveable. CVF Racing serpentine pulleys dress out the engine bay so the LS427 looks intentional, not transplanted. Jim's vision. Our build.

Built for Jim S. · Pensacola, FL

Photos

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