Saturday, March 22, 2025

1970 Chevrolet Chevelle LS6 - $187k

Original matching numbers drivetrain validated on January 18, 2025. Listed in the LS6 Chevelle Registry, Certificate no. LS6-194. Rotisserie restoration completed in 2014. Original CRV code 454/450 HP LS6 engine. Original Muncie M22 4-speed transmission. Original 12 bolt, 3.31 ratio Positraction rear end. Rebuilt drivetrain and F41 suspension. SS wheels with Firestone F70-14 tires. Refinished in the original Cranberry Red over black. Highly detailed engine bay and undercarriage.

Sitting atop the muscle car food chain in 1970 was Chevrolet’s SS Chevelle designated RPO Z15. Checking off this option delivered a 450 hp, 454 cubic inch solid lifter behemoth that cranked out 500 lbs.-ft. of torque and bludgeoned all challengers.
The 450 horsepower LS6 was the most powerful engine offered in 1970. The Cowl Induction system fed outside air to a 780 cfm Holley carburetor. The LS6 featured a beefy bottom end with four-bolt mains, forged steel crankshaft and connecting rods with forged aluminum, and 11.25:1 compression pistons.
Because of the LS6’s high (6500) redline, deep groove accessory drive pulleys were necessary. Thanks to new Federal emission standards, the LS6 was hobbled with the primitive Air Injection Reactor (A.I.R.) pump. That was the first to go when owners took delivery. Either the Muncie M22 “Rock Crusher” close ratio four-speed manual transmission or the three-speed M40 Turbo Hydra-Matic automatic were available with rear gear choices up to 4.33:1 rear gears and limited slip differential. Buying an LS6 Chevelle required the customer to purchase mandatory options, and it wasn’t cheap. The RPO Z15 SS 454 package was $503.45. The LS6 added $263.30 and either a M22 ($221.80) or M40 ($290.40) was required. The biggest bad dog meant an additional $988.55 to a base price of just over $2,800.
It’s agreed that Chevrolet produced 4,475 LS6 Chevelles, however there is no break down as to coupe, convertible and El Caminos in that total.

A rotisserie, no expense spared nut and bolt restoration was completed in 2014. Virtually all major components were rebuilt. This top end example carried a too high estimate of $250k to $300k at Mecum.

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