Hi Guys! Long, long time since I've signed on to this site. I got my 79 regal with a Chevy 350 when I was 17. I wanted to change the wheels since the day I got it, and only now that I'm 32 am I finally doing something about it lol. I would like to run standard body colored GM steel wheels with the poverty / dog dish center caps , 15x7 in front and 15x8 in back but I have no idea what the backspacing is. I have standard factory disk brakes up front and a grand national rear axle out back , which I assume is the same as standard g-body width. From there I don't know what tire to go with. I would prefer to stick with the tried and trueBFG radial t/a's for brand. Currently I'm running 14s, 205/70 in front, and 245/60 out back. I like that look and would like to do something similar with the 15s. So pretty much I need someone with knowledge of the 78-80 A/G- body to tell me what backspacing for the 15x7 and 15x8 steel wheels to buy, as well as the corresponding tire sizes. Thank You in advance!