IIRC, the R151 input is 30mm shorter than the R154.
One of these days (once the temps get back into the 30°s), I could measure them both to make sure....
I would be REALLY interested in hearing if the inputs are swappable without changing the gearing. I really doubt it is possible at all, but I sure would like to hear about it, since the only thing holding me up from swapping a 7MGTE into my 80 mini is a way to mate it with my R151....
I'm having a really hard time finding anyone capable or willing to cast a custom bellhousing to mate the two...
