texczech You can do it either way,I don't like to cut the collar off if I can avoid it. Last one I done was out of a 77 chevy pickup,took the gear off put on a .030 thick hard washer then reversed the gearput it back on and re-drilled the shaft thru the original hole in the gear. End up with a little slack up and down .010 would be fine. Then make an oilite bronze bushing to ride on the oily block below the gear and lastly make a stub shaft to reach the oil pump. Iv'e never done one with the clamp-on collar but others like it . Early on I just got an oilite bushing from the farm store 3/16x 3/4 roll pin 3/32x 3/4 roll pin to hold stub shaft pinned thru the flat at the bottom of the upper shaft and thru the bushing. Important that the hold down doesn't clamp the assembly down tight to the block should have some slack up and down. The oilite bushing was 1-1/8x3/4 1/2 inch bore if you saw it apart right in the center may have to shorten a little. The 2 shafts may be .012 smaller than 1/2 inch lets you get it stabbed.
