"Cheap" Weld Wheels: Ventura S104 - Opinions?

I'm kind of stuck in the same predicament, I think 18s can look good on the Duster/Dart Sport body, but I havent yet seen any hardtop Darts with 18s that have quite done it for me. I'd like to buy these wheels, but I think the rear backspacing is wrong for me. I have a B-body axle in my 68, & 275-60 on 15x6.5 Rallyes required fender lip rolling. That skinny of a wheel pulled the sidewalls of the tire in just enough. I don't recall axle width right now, but I was running spacers under the drums because someone had 2-1/2" drums on 2" backing plates. I just got the right backing plates from 72bluNblu so I can do away with that spacer, but thats only 1/4", just enough to finally mount the 15x7 Rallyes I bought from MrGTX a while back. Backspace was the same as the 6.5s, that 1/2" was fully on the front side. Going with 1/2" wider wheel & slightly less tire (255) and see where I am then. I want to have 2 sets wheels/tires though-cruise set & "performance" set.
I wish I lived closer and/or my car was ready for a road trip so I could actually try these on.