Re: Stromberg WW throttle return spring
Taking the Holley off and installing a renew kit and installing smaller jets (which is available and you might have to change the jets again until you settle on the one right for the engine) should show more power/economy gain. Holley spec for the 4412 main jet is 73 (the number is stamp on the side of the jet). A smaller number is leaner, I would only go 2 sizes smaller until I get it close then one size at a time to get it dial in.
However if you still what the Stromberg on your engine that fine too. Then would you sell the Holley, I hate to see it go to waste?
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