I got a IFS mustang II front suspension for my 40 chev coupe and it's 60 in track width. Got it from a friend, and it's tacked onto a truck frame. Everything is brand new. My 40 has a 57.6 track width.I'm going to run a 15x4 front wheel also. Got to measure, but I think the camaros are 60 or 61, and they are to wide. I was thinking of narrowing the cross member at least 2 in. I can make a jig to do this. I'm going to run a manual rack and was checking them out. What width would I need? I see alot listed at 44.5 inches, how do they measure them, anyone know? That wouldn't be total width I wouldn't think.