Looking to convert 4-speed manual transmission on a 71 521 with 1600 engine to a 5-speed manual.  Does anyone know if a transmission from a 1984 200SX will work? Do I need to get the driveshaft also?  Any information will be helpful.  New to this group so if this has already been covered and I am asking a dumb question please forgive.  Finally got it running good, the gremlins have all been outed and now just want to drive over 55 mph without exceeding 3000 rpm.  California freeway drivers are merciless on slow moving vehicles.

Welcome....read here:
http://olddatsunpickuplovers.com/forum29/359.html

[user=525]kmallon[/user] wrote: [quote] Does anyone know if a transmission from a 1984 200SX will work? ..........[/quote]The simple answer is no.  See my last post in the thread that 71-521 linked to.  You'll need to get a trans that was used behind an L series engine.  84 would either be a NapsZ or a KA and those transmissions are slanted for those engines.