Converting from a three speed manual to a 4 or 5 speed
There's the 833 OD but the gear splits are kinda funny.
Truck like.
AX15 and NV3500 5 speeds have almost the same gear splits.
The 833 and 833 OD are closer to a drop in.
I've read about toyota supra 5 speeds as an option but don't have facts to share.
Tremic/TKO requires fabrication work and/or tunnel and/or frame cross member mods.