Quote:

If it's a factory 1970 6 pack motor, your pistons should be about .02 in the hole. If it's not a factory 6 pack motor from 1970, then your pistons should be about .09 in the hole. That is assuming your block's deck, pistons, rods and crank are all exactly to blueprint spec.





.090 for a non 6pk ? whats the compression ratio that the factory stated in 1970 ? if its the same as 69 on the HP 440 it would be 10.0 , that piston will be .040 in the hole at blueprint .

oh , and yes a 906 is assumed at 86-88cc but its more like 90-92cc , general rule of thumb is you remove 1cc for every .005 you cut off a 906