71 Dart Swinger rear tire fitment
Bh- nobody can answer the sbc or lbc question without seeing the car. There is a50/50 chance that it has been swapped. It could even have some of each. "
Pretty much everyone will tell you that 4- 4 1/2 backspace is best on a 7 " rim
LOTS and LOTS of threads on tire fitment if you search
See "post your wheel and tire pictures" thread