What fix is needed for the RPM heads? I am not very familiar with them and this is the first I have heard of it.
By the way this is a really interesting thread. My 383 has all the wrong components; 509 cam, stock intake, low compression and 3:23 gears. Needless to say it runs like a dog. I have been waiting a bit to make a decision on what direction to go. I was ready to put the thing in a corner of the garage and put a built 440 into the car but maybe a few critical changes to the 383 would help.
