This is used to lap the seat where the check ball sits in the oil pump (57-76).

Homemade check ball lapping tool made with a tool steel shank and a 3/8“ carbide ball tip on the end. The pocket for the ball to sit was cut with a 3/8” ball end mill then a few drops of Loctite 404 to keep it there. 1)

These precision cuticle scissors are great for removing external retainer rings.
Especially the ones on oil pumps or anywhere they are hard to reach.
The normal ring pliers are bulky, the end points hardly match the holes and the tool usually slips off the retainer.

These scissors have fine points that won't break or slip on the retainers as the normal ones sometimes do.
You can get the points deeper into the holes which helps to hold the retainer more sturdy while removing it.
These work for removal and installation of the retainer rings. ²⁾

There are 4 bolts on the 77 and Up gerotor oil pump. But only 2 are used to bolt the pump to the engine (front outside and rear inside). The Allen head cap bolts have 1/4“x20 threads and a 3/16” socket head. The front bolt can be removed / installed with a regular size Allen wrench but the rear bolt is inside the frame. So you have to go between the frame and the engine to get to that bolt. A regular size Allen wrench is very difficult to use as the 90° bend on the end hits the frame /engine. This 3/16“x6” Allen socket makes the job a lot easier.