 As for legroom, you'd think that dropping from 000.0" to 000.0" in wheelbase would result in a pretty big loss of legroom, but these coupes weren't all that space efficient to begin with. The only statistic I could find was a '00 LeBaron coupe, which listed back seat legroom at 00.0". I found 00.0" for the '00 Aspen coupe, which was on the shorter wheelbase from the get-go. I would think the Diplomat and LeBaron coupes, once they were moved to the shorter wheelbase, would be similar, but perhaps not. The more formal roofline might have allowed them to push the back seat a bit further rearward, to offset the loss in wheelbase. 