i did the swap, my D50 was worn out and looser than a cheap lady of the evening, i am a die hard solid alxe guy though. i found my 60 and a 10.25 Stearling rear for 650 for both. didnt need the rear but i thiugh what the hell for 650. it even had the right ratio. after the rebuild and including the axles i had about a grand in it total.