I'm very familiar with that guide... The individual who wrote it, Greg55_99, a member here amongst endless other sites from what I've been noticing, contradicted himself in
this post(granted it was written earlier than that guide I suppose). For simplicity's sake, I'm hopeful it matches the AX15's input shaft length, as he stated in that post. However, of the few MA5 swaps I've found done, the measurement always seems to come out differently? I agree that the clutch shouldn't be a problem, just haven't gotten around to researching that aspect of the build. I think I'm probably much better off compared to the R154 swap where there is really only one 10.5" Toyota 21-spline (that I know of) commercially available clutch and it's not exactly a high performance model.
See picture from a lexus website... You can also note that the end of the input shafts length is significantly made up of a portion without any splines which should be very simple to modify, if at all necessary(knock on wood).
