what year mustang? im trying to figure out why he needed to BUY a mustang that had a v8 SWAPPED in. why didnt he just buy a V8 mustang?!?!
i still like the " B piller isnt right" approach. tell him that the structural support of a V8 is different from a V6 and that he car is crap cause one day he is going to stress the frame cause there is no support at the B pillar. No need to find out if he is lying, just make him feel stupid.