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Originally Posted by Half-Inch Stud
Now we're getting somewhere. Very clear to me that you need to run the Ram III STYLE Head (48, 12, 16, 13, and many other 2-digit numbers cast on the center exhausts such as 64, 5C) to get the 10:1 or 9.5:1 with a dished piston.
Heads to avoid: pressed-in studs or small-valve-heads that you can pass a match between the valveheads)
Then you will only have minor ping with 93 Octane.
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Alloy aluminum head 72cc has he. Think I he does,well. or
Mark, he has 72cc aluminum heads. Well, I think he does. lol.