Marc,
While waiting for (=trying to wrestle) my fully prepped transaxle from Andrew Garcia I had no choice but to stick a spare stock 3.0 transaxle in my 3.7 for shake-down, dyno, etc. Not surprisingly the clutch lasted only a limited time - not even enough to fully map the engine

To get it back up and running I received a 4-puck race clutch from Andy (at Performatek). I will swap it shortly, but it should get it back up and running at a moderate cost (list of $250) - there are no guarantees, but this clutch holds more than his 9-button carbon fiber clutch which is for street cars and according to Andy holds about 300 rwhp (although I doubt he will warrantee it given your engine). This is with stock pressure plate. The 9-button may be something to consider if you are getting impatient
For my other race car

I put together an oil cooler setup fairly affordably. Get a sandwich plate with thermostat, make two oil lines, get the cooler, mount it and you are done.
Jes