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· Richard Jemison
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8,987 Posts
Go for the one "Sold" as higher compression. Neither makes 10 to 1. Shave the head .030" and get CR closer to 10.5 to 1. That will improve performance (Torque particularly)
A little seat with (no 3 angle seats) and top of the ports from the guide area straight into the open seats will add to whatever the piston/cam and compression would normally make.

Do it right if doing anything.




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