Backspace question

70 Swinger here, 14" sbp wheels. Thinking about putting some Cragar SS on my car, would I be safe if I put a 14x7 with a 4.1 backspace on the factory 8-3/4 drum rear? Currently running factory rallies with BFG 245/60/R14 on the rear.
Thanks FABO
cheers.JPG