I would really love to have a Passon 5-speed but I already installed a Richmond 5-speed before his ever came out.
A Richmond is a great transmission if you don't mind cutting your floor and torsion bar crossmember it took me a weekend to cut and fab the crossmember,cut and box my torsion bar crossmember,and make a custom trans tunnel
Buy the Passon unit and just bolt it in much easier and I believe a better transmission than the Richmond IMHO
Just talking from first hand experience here
Gus