My roadster is a 28 on Deuce rails. It's tight for me, and I'm only 5' 9". I've been on a few trips with an A body, and they do get a little tight. My Deuce had more room, but the Merc looks like it will be capable of seating 4 very comfortably, and the trunk is big enough for all their luggage !!!!! Ran across a 46 Chebby cheap, anybody interested???