I have a 69 and have an opportunity to purchase some Cragars. Just wondering if these will fit and what size tires to use. Also pros and cons of the unilug. Fronts are 15x8 with 2 1/2" bs, rears 15x10 with 3 3/4" bs.

if you're measuring the backspace right, those are the "oldstyle" reversed rims. They will stick out past the fenders 4 or 5 inches!

what he said.
You have to be careful.
If you look in the classic industries catalog, they only offer a standard spacing to be safe, on the crager. It gives the standard offset measurements as well. You can buy a "deep dish" or "Reversed offset" from Crager, they just do not have it in the classic industries listing.