To follow up/confirm, any shifter will work with an F23 swap. You will have to get the newly added F23 shifter cable bracket from DF, though.
The clutch and pressure plate are specific to the flywheel, and the flywheel is specific to the motor. All F35 transmission-equipped motors came with 8 bolt cranks, and all F23 transmission-equipped motors came with 6 bolt cranks, thus different flywheels. But the transmission input shaft splines are the same between F23 and F35, so the transmission doesn't care which clutch is on the engine.
Any shop should be able to do the LSD swap. It's also as straightforward as any other aspect of a Goblin build, aside from three aspects (for me):
- It can be difficult to break the intermediate shaft retaining bolt loose. The input shaft will want to spin; I 3d printed a socket adapter so I was able to put a wrench on the input shaft. Piece of cake after that.
- The new LSD will need bearings pressed onto it. You will need access to a press, or a shop should be able to do that easy-peasy. If you choose to replace the races in the trans case, it requires some creativity, special tooling, or both. Technically you should replace the case races, but if you're confident the new diff bearings match the old case races, it should work, and other have done this successfully before. I was able to slowly and carefully cut through them, at which point they will just fall out.
- The intermediate shaft seal retaining bolt cover is a bear to source. They can be had out of GM Europe, or you can slap something together. I actually 3d printed a replacement cap and RTV'd it into place. I had a catastrophic fluid leak that turned out to be a bad input shaft seal (on a new OEM part!). I thought it might've been my cap, so I ordered a GM replacement, but it turned out that was holding fluid fine, so false alarm there.
DM me plz. Would you be interested in selling me a 3D printed counter gear bearing cap? I'm trying to source all the parts before I dive into this project and this one i'm not finding online.