Well I've decided to get some new rims rather than use the fin type stocks on my 79 d100..I'd like to use a 8" wide rim thinking 235 75 15 . Been looking around to find the correct spacing....found a chart that lists stock 6" with 0 offset / no backspace info ..and found info stating LRE rims were 1 1/2" backspace with -25mm offset..is this correct? really don't want wheels poking out and of needless to say non rub either. Any info would be greatly appreciated..this is pic what may go on truck.