i got a good deal on craigs list torque thrust II 17's from a guy off craigs list who said he pulled them off his 70 camaro. they wanted $600 dollers, i got them for $500, he said you only needed backspacing for the back rims, but i went to put them on my car and thier rubbing on the front and back, so can i get backspacings for the front and back and how big can you get them in because the back looks like it might need 3", or should i try to get my money back? All 4 are 17 X 9.50. These should fit right? Front and back? How much are backspacings?