I've used the SMR adapter (on another app) & it was a quality piece but I didn't like the added length (1/2" iirc) & the (included) pieces need to deal with that. I also have an unused JB ultrabell adapter (for another app) & I like the looks of it, you cut the current trans bell face off back to the pump bolt & toss it & bolt on the ultrabell in its place & it has the new bolt pattern on the front. You are in effect just reshaping the bell face to match the trans going against another eng type. Not sure if there might be an input shaft alignment issue but I'm sure it has been addressed (by them) if it is a potential.