Thanks for the replies so far ...
My main concern is the larger center bore of the Wheel Vintique rims ...
I've contacted Horton's but their price is twice that of Summit Racing, don't mind supporting the local guy, but double the price puts them out of my budget by the time I replace the hubcabs (stock won't fit) and the tires...
As far as backspacing goes, I was actually thinking of using the 15 x 6 rims on the front to drop the front end down a bit, and the 15's do have the correct 3.5" backspace. I know I have to reset the caster angle, but with new tires and rims, full front alignment job is in order anyway.