Hey Y'all, Did a little searching, but everything covers 15x??? and 16x??? I have a D60 and a GM 14 FF that I'm putting in my 83 K10. I'm planning on running 15.5x39.5x17 TSL's. I've chosen Eagle Alloy 589's as the rim, 17x10. What is the bolt pattern: 8x6.5 or 8x170mm? I'd think it's 6.5, since GM isn't metric. Also, what backspacing should I use? I don't want more than 2-3 inches of TSL sticking out past the fenders and I don't want to compromise turning radius on the D60. Your help to this K10 newb is most appreciated. Oh, by the way...who would you recommend to go to for rims and tires and why? Thanks! Manny P.S. I would have loved to stick with 15's, but there are no descent rims out there for 15's anymore. Yes, I am trying to balance looks with functionality.