Besides the obvious difference with the stock grill trim, the interior and chassis plates between the '49 and the '50 are somewhat different. The rear package tray of the '49 gives way to an area where the top would fold on the '50. The biggest thing I think to watch for is that the main portion of the floor is longer than the '49 and where this is most notable is the chassis floor area and where it meets the floor of the interior part. In order to put a '50 interior in a '49 chassis this only requires a minimal trimming to fit. As you can tell I'm a big fan of the subject and the kits.