New Tires

[Steve McDonald Formally known as Mcdonas]

No, they are a close replica wheel. I have the original wheels with repo Goodyear BlueStreak's (6:95-14) on them. They look great but are really terrible to drive with.
I think the wheels are the same offset as the original Magnum 500's but I'll have to check. the tires have about 1/2"-5/8" clearance between the tire and the ball joint.   They seem to clear both the front and rear fender lips (non-modified). It looks like in a tight turn at high speeds the front tires might just have interference between the tire and the fender lip. I really don't push it as I am not a really fast drive so for me it may not cause any issues.

[67 GT350]

I just put the Lucas Goodyear polyglas small letter tires on my Boss and it drives just as  "NICE" if thats what it is called, as it did with the BF Goodrich....