Well.. after months of saving and tons of research.. I went ahead and did the Z32 300zx transmission swap.
Thanks to A. Hoke performance I had an adapter machined which was absolutely stunning and the necessary instructions, fasteners and even loc-tite was provided!! (PM 240hoke he has more for sale now!! (9/24/08))
Parts list included:
Z32 transmission (1990-1996) (A. hoke happen to find a gold mine)
Fidanza short throw shifter (ebay)
New drive shaft from The Driveshaft Shop
Now the Z32 transmission will need to have the bell housing machined which A. Hoke was able to also provide me =)
The install was in a 1978 280z.. which has a wider transmission tunnel then the early 240z's so I had some room to play with. As for the mounting ears/tabs on the transmission tunnel they had to be trimmed off to fit the transmission. I really trimmed quite a bit off.. prob 1/2" or more in some areas. It was a very very very tight fit. If you think i'm exaggerating.. have fun
Installing the adapter was super super easy.. just aligned it with the existing dowels.. put some loc-tite on the bolts and zipped them in and torqued em to to spec. boom. I installed a new Fidanza aluminum flywheel and new ACT clutch at the same time too..
I would definitely recommend a transmission jack.. it's amazing
I probably spent 5 hours trying to get the damn input shaft aligned with the damn engine.. even with the jack.. I couldn't imagine bench pressing it for hours. Not with how tight the transmission is into the tunnel.
I used the Z32 fork, L28 throwout collar, L28 throwout bearing, L28 flywheel, L28 clutch and pressure plate.
You can use the factory slave cylinder.. however I am using my 11/16" slave cylinder from a Nissan Pathfinder. Bolted right up.
These are the drive shaft specs
Keep in mind if you have a R200 LSD you will need a different differential flange.
As for the shifter it was a royal pain building my own shifter mount and getting it aligned just perfectly. The Z32 transmission has a drive shaft type shifter linkage that is a few inches long. A. Hoke cut off the drive shaft and just welded the yokes together to make for a perfect fit! I built the shifter mount out of 3/4" steel tubing.
Now for the cross member I used some 1" square tubing and also some 3/4" tubing and tucked it inside of the 1" tubing and welded it up for some increased strength. This allowed me to use the factory 280z transmission ears/tabs... and use this new crossmember. I did not like Garrett's approach to mounting the transmission and I did not want to weld in reinforcement plates and new mounting tabs.
Due to the new crossmember I had to redesign my exhaust a little bit.. the factory Holset turbocharger downpipe has some parts that needed to be ground down but it worked out nicely.. I wanted to re-route my exhaust anyway.
I would say the hardest parts of the swap were getting the damn input shaft aligned due to the massive size of the transmission and the little room I had. Also getting the shifter just right was kind of annoying.
Overall the transmission is very firm, shifts great and is a lot of fun to drive. It takes a while to get used to the shifter though.. its crazy weird feeling.