Re: Stromberg WW throttle return spring
I would try rebuilding the Holley first.....as Any carb gets older and gaskets dry and needles and seats wear....your mileage will drop and performance will decrease. Rebuilding that holley and doing some tuning will provide better power over the stock WW....ask anyone that's done it. 
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"Excuse the rust I use my truck"
1964 GMC 1500 305E/sm420 4 barrel intake mod and dual exhaust.
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1964 Chevy C20 292/SM420
1966 Chevy C10 292 hotrod 6/TKO600
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