I am getting all the parts i need to put this motor back into running condition and the old starter drive was broken and the gear is worn so im trying to find the right drive for it, ive found [lester] and prestolite,nevillle, and several other brands for this motor , the one i bought for it is made by united technologies #02088-40-ov20sm and the shaft size is too small for the armature, my question is all these all different sizes for each brand or how can i id the starter i have it spins great with plenty of torque. where can i find a drive for it. ebay has some but getting the sellers to measure theirs is not easy.