the battery could have drained during the install, i assume it took a few hours and your domelight may have been on. Check your battery first and if thats not it, recheck your wire connections. Did you use a volt meter to check the column wires
I have 17x8 up front and 17x9 in the back with 4.5 and 5.5 inch backspacing. There are 255/45 all around. I don't think I can go any wider out back with the quad shocks. Also up front they rub a little going around a corner. My car is lowered 2" though. Its a 91 GT.