Quote:
Originally Posted by Old Truck Man
The 250 in my 66 GMC short bed . Equipped with a offenhauser intake and valve cover, hedman hedders. It had a holley 390cfm four bbl. but if you don't open the 4 bbl up the gas in the rear fule bowl turns to varnish and gums everything up. Ask me how I know? So I put a 2bbl Rochester from a 283 chev on it. Its backed by a power glide trans.
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Well..that's why you floor it so the secondaries open up and let the old fuel out and fresh come in...I do that with my 292 now since I have the 600 on there. Once I get going I will leave the pedal at the floor for awhile and let the secondaries clean out. No issues yet.
Nice engine you have! I like the 2 barrel idea.
