I dumped my twin 660 Holleys with 50 cc center squirters and mechanical secondarys. There were just a pain in the butt for fouling plugs etc.
I went with twin 600 Holley vac secondary and 30cc pumps. That was WAY better and the 30 cc pump shot was fine. Not sure why you would need 50 cc unless your vac secondaries are kicking in to fast. I'd try a heavier spring to slow down the secondaries and go with 30 cc
427 FE dual fours which recently "wiped a cam lobe". Engine out for a major redue. Which I HOPE won't take two years!!!!
