Top End Needed

I would not run a super victor on that. The RPM can feed that OK. I'd look for a Victor340 if I was going to choose an alternative intake.

I'll say fuel delivery issues. The current carb can carry it fine. If you have another carb that is known to be good, swap it and see if the car still lays over. If it does I'd be looking at fuel pump/regulator/line sizing.