Power Valve Selection: The Definitive Answer

You said it lightly surged at cruise iirr.
That's the jet. 4 jet sizes at a time? Be nice to see one change at a time, like 2 jets @57 Awesome to hear it's gone, just keep an eye on the plugs though... that's a really big step in enrichment...and IF correct, means the carb is a hair too small. That would be suprising to me.

I've thought of that as well.....and it would surprise me too. I HAVE an old style Holley 600DP I may sling on it just for kicks. LOL