Small Block oil pump bushing

The hard part is not installing the bushing, but having it sized properly for the drive. I cheat, and use an old good drive with the gear cut back to install it, so it is sized correctly after install. Also, they tend to crack the flat area off if you just use a too large driver or sockt..And if they dont sit flush in the block, you may have a hard time with timing jumping around, and the distributor not tightening down all the way. You should be able to turn the drive easily with a screwdiver after it's back together..If it feels tight, it is prob not sized right. Lastly, keep in mind..if you dont have the tool, any particles you make trying to size it right, end up in the oil pump. is all this trouble worth $80 to you?