the L-72 427 was rated @450 HP when introduced... they soon downrated it to 425 HP(with no other changes) for political reasons... in 1971, Richard Ruth built a 55 Chevy for the movie "Two Lane Blacktop" (later used in "American Graffiti")... the Tunnel Ram/twin Holley equipped L-72 crate engine backed by an M-22 4 speed and a 488 geared Pontiac 9.3 rear, went 10.83 while testing at Irwindale? Raceway... That Nova needs some tuning!...
Last edited by 7mm_Loco; 04/19/24.