The 47RH was only for the diesel and V10 applications. In that application the converter sticks out from the bell housing face about an inch or more and it's overall diameter is much larger, so a 47RH isn't really going to help you.
What you are basically needing is a billet cover single disc lockup converter for a gas 727. No one I know of makes it because you would need not only the Ultra Bell for the B engine adaption but also a spacer between the engine and trans for the extra depth and then you would still be limited to the smaller diameter converter. I've never said this before but you might have better luck, or at least more converter options with a Turbo 400 for what you are trying to do.
So the 47RH/618 front is that different than the 46RH/A-518? There are a lot of adapters and there have been a lot of 518s bolted to 440s.
I spoke to a number of people re the MH application
https://www.transdepot.net/46RH-47RH-48RH-Dodge-Stage-1-Transmission-89-95_p_138.htmlhttps://www.bullripper.com/HEAVY-DUTY-A518-p/b30.htmMy 47RE in my 5.9 B3500 van is supposedly also adaptable to the RB/BB, but I wanted to avoid a electronic controller. It was built with all upgraded hard parts at the time (the extra planets etc)
I got a quote for a 700R4 Chevy, but they would not warrantee it in a MH application...
