My lowered ''79 Malibu also has 235's BFG/TAs. The Corvette rallies they are mounted to have a 4 inch backspace. There is slight rubbing at full wheel lock. It's tolerable.
I'm using S-10 springs, but it been awhile and don't have the Moog # number on-hand, not to say that you would use the same spring.
Send me a pm and I'll hunt up the paper work concerning the various frt springs available.