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 โ€” 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 ยท Mad Labs Performance HQ ยท 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 ยท Measured at the flywheel ยท SAE Corrected
Published with the owner's permission. Dyno data shown with customer consent.

The Build

Engine
Engine Blueprint Engines LS 427 ProSeries โ€” 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 โ€” 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 โ€” 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 โ€” 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 โ€” vintage cab, vintage paint, vintage everything you can see.

Blueprint's own flywheel sheet on this engine 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 โ€” no wheel-hop, no axle-walk, just grip. Up front is the OEM Tahoe suspension geometry, dialed in. Brakes, steering, cooling โ€” 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.

The truck isn't finished, because these never are. The latest round put Nu-Relics power windows behind the stock door panels, with the original crank handles kept as the switches โ€” nudge one a few degrees up or down and the glass follows. No winding, and nothing on the door that says anything changed. A TCI paddle-shift kit went on the 4L80E too, so it rips through the gears on command instead of waiting on the throttle. Jim's vision. Our build.

Built for Jim S. ยท Pensacola, FL

Photos

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