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Author of "101 Projects"
Join Date: Jan 1995
Location: Rolling Hills Estates, CA
Posts: 27,056
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I agree with Henry. Unless you're trying to extract one more 1/2 HP from a high-RPM race motor, it's really not worth it. I basically said this in the Engine Book too. Also included in this is boat-tailing - not a real good return on your time/effort/money.
-Wayne
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