My Delta has a 3 speed TH200 and i was wondering if there was a 5 speed transmission made for that model 307 or perhaps go with the 4 speed model?

Just curious.

 

My opinion is:
Stick with the 200.
The overdrive 2004R trans is junk.

Any other trans like a th350 or th400 won't work with your crossmember and driveshaft setup.
You would have to find an 80 delta for a th350 xmember and shaft I believe.

 

Ok thanks.