I have a 1971 Dodge M375 RV with 413 engine (6 bolt crank), 10k GAVW, and would like to upgrade to a locking OD trans rather than ever rebuild the A727 which has 70k miles (but runs OK).
What options are there?
I found 3 options for 47RH:
~$4.5k https://www.coperacingtrans.com/?product=crt-518-hd-1-transmission
~$4.5k https://transmissioncenter.net/product-category/dodge/?product-category=level-2-47re-47rh-618,level-2-48re-dodge
~$3k https://www.transdepot.net/46RH-47RH-48RH-Dodge-Stage-1-Transmission-89-95_p_138.html


A 700R4 is probably too weak to last, but Wilcap has an adapter
The ZF Dodge transmissions don't have RB 413/440 adapters (a real pity)
AFAIK there are no Allison adapters