I would recommend a W56, probably the best, and easiest to find, the SUPER strong R151 is BEST but rare, and 
expensive when you do find one
sounds like the acme adapter just mounts the engine to the bellhousing, instead of alot of adapters mounting to the tranny itself
Right, its a plate, not the whole bellhousing.
I have a similar one adapting the NV3550 to to the Ford bellhousing in my 74 Bronco.
So --ALL-- the 4 cylinder Yota 5 speeds have the same bellhousing pattern where it bolts to the engine?
Thats cool.
