I just finished my 69 L88 clone this summer. Its an auto,4.10 rear,Lemans blue. 12.5 to 1 compression is right on for fact specs.The cam is quite wild,would work better on the street with a 4 speed.I had bullett grind mine,I'l give you the specs if you like.I feel the car is quite streetable and I do drive it whenever time permits.I run mostly 110 octane race fuel,but it will run on 92 with some additives.The car was built to compete in the pure stock type classes and has done very well so far,11.99 @ 118.05 in stanton this past Sept.I wish more Vettes would come out to the Pure Stock Drags!!! Its a total blast!!!!!Oh yeah,my motor made 503 hp on the engine dyno @ 6000rpm.485 tq.It went to 575 hp with a cheapo set of headers!! @6900 rpm!