Fuel line? Is it enough

Coming in on the end of this issue: Have a 440 Dart went to the drags and on top end noticeably fighting fuel starving issue. Had Carter mechanical pump. Did the budget upgrade, used 1/2 (really just a few cents more than 3/8's), ran a Walbro (sp) pump and Aerotech regulator with a sump on the tank and 3/8 return. No starving issues on top end now. A bit overkill, I get it but it works