youll have to increase the main jets 4 sizes bigger i think .
with out looking in my manual.
I would get a DP carb for racing.
otherwise leave it alone replace the power valve its there for a good reason.
CHEVYRACER........I WOULDNT USE A BLOCKED POWER VALVE UNLESS YOUR VACUUM IS THAT LOW...USE A GUAGE AND CHECK AND PUT THE APPROPRIATE VALVE IN...YOU OBVIOUSLY BLEW THE VALVE FROM A BACKFIRE WHICH IS NOT THE REASON FOR A BLOCKED VALVE...SOMETIMES YOU HAVE TO JET 6-8 HIGHER DEPENDING ON ENGINE...IT MUST BE AN OLDER CARB CUZ THE NEW HOLLEYS HAVE A BLOW PROTECTION.BLOCKED VALVES ARE VFOR ALL OUT RACING APPLICATIONS www.hardcoreparts.ca
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