I used Vagabond with great results. FYI, most "Pro" casters use, or used, Vagabond too. One great thing about them is you can custom order, different gel times and durometer (hardness). Pigments are available too.
I wish someone would do a corrected body with the front wheel wells from the L.A. Dart wheel stander kit. The MPC Demon body has been sadled with Duster Wheel openings since the first release.
Very early Pantera's had a small push button door handle. Since you are removing the molded in handle, why not back date it to the early, unique style?