there are no modifications that can be done to a 1350/54 t-case itslef. It is a chain driven case so there are no deeper gears for it or twin stick setups because of the way the case actually works. You can certainly build a double with some of the kits out there, the stubler is one, but either way you are looking at a minimum of moving the t-case rearward 6-8 inchs for the smallest setup out there. A lot of the doubler kits are setup to be made out of another 1350 or 1354 and all of them require modfications to make the shifters work for the doubler and the original case. The only thing out there that will bolt in and give you deeper gears and a twin stick setup and be the same length is an atlas. You could look around for adapters to bolt on other t-cases like a dana 300 or something that would allow you to use deeper gears, I don't know whats out there for that but there probably isnt much.
'94 2.3L, M5OD, BW1354 manual, 4x4, 31x10.5 BFG A/Ts, 15x8 AR Chamber teflon rims, 7.5 4.10 lock-right w/disks, D44 SAS 4.10 aussie-locker, duff traction bars, electric fans, spintech muffler, duff poly body mount bushings, Lightforce RMDL140's, cobra 18wxst II, herculined floor, 375,XXX
'87 camaro 305 carbed (needs engine)
'92 subaru legacy 2.2L Turbo (needs tranny)
TRS Tech Support Staff