Interesting. I "restored" my 1928 101 to RH shift, RH MAGNETO ADVANCE, LH throttle. All the Indians I have owned came to me as RH shifters with LH throttle (putting the magneto control on the right).
Not only was that what I became used to, I believe it was the original or originally preferred arrangement. Its been the joke that Indian set the throttle on the left (therefore shifter on the right) so right-handed police officers could shoot and so, of course, HD had to do something completely opposite.
I have a 1948 HD Panhead with a LH shifter (RH hand throttle, LH magneto) and I can not change the shifter - I find it very uncomfortable to control the bike with my RH alone while shifting.
Bob