I have a Tanks Inc. tank & pump on my 68 Charger & have a carb, I run a return regulator, 3/8 supply & 3/8 return, runs 6psi, works great.

1968 Charger COLD A/C Hilborn EFI
512ci 9.7 compression, Stealth heads, 4.10 gear A518 ODtrans 4100lb,10.93 full street car trim
2020 T/A 392 Stock 11.79 @ 114.5