AFAIK, After the introduction of the Long Cockpit (LC), the LC became standard build of the Universal Chassis. Most cars going forward, live axle and De Dion, were LC. The LC became possible with the introduction of the Ital live axle, that had a shorter input housing clearance than the Ford Escort axles and allowed the rear seat bulkhead to be spaced back 2 inches. Soon afterward the DeDion was built on the LC. From that point, the short cockpit was available but only as a special order live axle. Therefore, most chassis built after 1990 (should) be LC. At your height, OP, a LC would be fine even in bench seats. For me, at 5'7" I needed to install sliding seats, from an 85, I believe, that are about 4" thick and I still have to slide them 2" forward. I wish I had a SC. But I get a lot of better design with the LC, like a front mounted radiator and gearbox mount options. Yes, my 96 powder coat is crap and the passenger foot well is short. I think it would be simple to fab an extension if I relocated the battery.