any one out there with a first gen riviera happen to know the actual rear end width from wheel mounting surface to wheel mounting surface? i have an opportunity on a 63 riv rear end for my 54 buick rear end swap. i cant find any specs on this world wide web that will help me.
According to what I can find, both the '54 and the '63 have the same rear track, 59". Track is measured from the centerline of one tire to the centerline of the other tire on the same axle.