Looking for possible carb recommendations...
IMO, I'd look for the big primary T-Q.
Anyway, a stock 77 - 440 isn't exactly a power house and the year is a bogged down engine. Dead on ratio and emmissions, etc... I have a 78 - 400, it's another dead on arrival engine.
Gear ratio has some say in this, but a 8-1/4????
OK, your not goona like this one but.
650 - 700 max.