Im picking up a 76 F250 Highboy this weekend. The p.o. Dropped in a 7000 mile old 390 from a 68 gal. or so he says. It's got an RV cam, long tubes and a single plane street master manifold with an edelbrock 650(I think). I plan on ditching the carb asap, I'm a Holley guy through and through. From reading on here the street master is junk. Would a performer 390 be the intake to use? The use for this truck is towing and the occasional and I mean very occasional wheeling.