Barry,
Would you share the displacement, cam specs and head flow data from undy's engine? Reason I ask is you spec'd 1500 cfm of carbs to QFT. I know the engine will only use what it wants based on load with vac. secondarys.
Do some of Marvin's modifications involve the idle feed restrictor relocation? Mine have been relocated and made smaller with great improvement.
Also curious as to why a modified carb has choke towers intact. Is it because they're 750's and more cfm flow is not needed?
Here mine flow 1304 cfm at 427 cubic inches. They work perfectly.
Thanks,