heys guys i got 10 holes for my notch it came with the ugly ass hubcaps and the stock wheels were 14 by like 4 or some **** and i just asked my mechanic how much it would cost to mount and get new tires. I need 15 by 7 tires and he said that the tires would throw off the car or something and make my check engine light coome on and stay on is this correct my car is an 87 notch.