Re: Wheel question
You haven't given enough information. How wide are the wheels?
ideally you want about 3" from the face of the hub to the outside of the tire. Fronts can only take up to a 225 width tread, rears about 255 (stock). So front should be a 7" wide rim with a 4" backspace. Rears have some more room to move. 8" wide with a 3.5-4.5" back space.
1968 Base hardtop 250 with a P̶G̶ built 2004r
Holley 390 CFM carb
Langdon split header to a 2.5" exhaust