I went ahead and got the casting number off the block, it is 3970010 which is either a 68 327 or a 69-78 or something 350. The guy I bought the truck off said the engine was a four bolt main from a 73 z-28 and with checking the other numbers, I came to the conclusion he wasn't bullsh!ting me. The engine stock was 245 hp, mind you, the heads had been changed as earlier stated to 305's. How much power loss would there be from these heads being installed. My comression ratio is about 10.5:1 i figure because I have to run premium all the time. Does high compression mean higher hp, or just a cleaner burn?
|