The car came with a 396/375. The L-88 was not installed by Yenko Chevy. I bought this engine in the Spring of 1969. I put stock L-72 pistons in it and used the heads from the original 396/375. Did run well though, turned consistent 11.40s! D. A. Santucci did the engine work sometime in the late 70s. He was pretty famous in his own rite. He won a lot of top fuel and funny car races and beat alot of the big boys! He passed away earlier this year.
