ok thank you for an answer.
i have a 340 running 12.1compression and i am trying to use pump fuel instead of race fuel. what choices do i have if any? rather not change the pistons unless this is the only or best choice.
can magnum heads fit and work right on a 340 block? and if they can is there anything that needs to be done to them or the block? also can i use the 340 intake ? thanks