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Discussion Starter · #1 ·
I have a 79 Shovelhead.
Iam going to redo the top end.
Iam going to bump the compression up a little.
I am going to use a Andrews AB grind cam.
I have drag pipes and a SS Super B .
How much of a performance increase would i get from a Thunderjet installation. How much trouble are they to install.
Thank You
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