I have been transporting my '69 Z in a 20' Roadmaster without issue for several years. It fits just fine. You will need an escape door on the driver side. Unfortunately, mine side door sill is too high to allow the driver door to open through the escape door in the trailer. You should have seen Jerry Macneish trying to get out of his '68 in my trailer. He made it, but I thought I was going to have to pull him through the driver's window head first.