Ever consider doing something custom on the interior? My seats were cheap, but I loved the deleted console I did in my '95. My console was nothing but a rattling, squeaking POS.
This was after I changed the carpet to black.
All you have to do is trim the bottom of the dash straight, and weld a piece of round bar from the inside of the dash to the floor (up by the firewall out of sight) for good support. Otherwise the dash will have a small amount of bounce over bumps. Anywho, just throwing out ideas if you want to be different and give it an old muscle car feel.