Front Hub Diameter for 65 Barracuda - Are there differences between 6 and 8 cylinder?

I'm restoring a 65 barracuda with a 225. Found and purchased a 65, 273 2bbl car for body parts, for quarters mostly, mine have been repaired and this one has rust free. Both cars have 13", 5x4" bolt pattern drum brakes. I've had a hell of a time getting the 13" front wheels off the drums on the V8 car. As it turns out, the hub centers on the drums is larger than the wheel center hole. So, someone put the wheels on and tightened the lugs so much that they jammed onto the center hubs. The car has the 7.25 rear and wheels fit the center hole fine on the rear. I've been researching to try to find if a V8 car has a different hub than a S6 car, but my research, looking at MOPAR parts books, etc. indicate that are the same.

Does anyone have an idea what hub/drum combo might be on the V8 car that would be 5x4" but have a hub diameter larger that what fits a normal A body 13" wheel?
The center register (hub) diameter is the same. As far as having issues getting the wheels off, don't forget that the driver's side has left hand studs... and after all these years it's not uncommon to have a mish mash of replacement parts on them- LH studs/drums/rotors on the wrong side, RH replacement studs where the LH ones originally were, etc.