Not that unusual, trust me....
PUMP BODY: First, never use a pump body twice unless you are reinstalling the SAME pump rotor,slide,and veins,
that came out of the running trans. If you are going to reuse,modify pump body as will be explained and reinstall. If pump rotor,slide and or body needs to be replaced start with a "refinished" body. The ONLY way to correctly do this is a tideous and time consuming method. First, our experiance has led us to use GM parts EXCLUSIVLY and they must be ordered in sets from them(GM) at the request of the builder. They must be exact to .002. This is how we do it and have been commended on it by GM themselves:.......
It is imperitive that the pump rotor and slide are measured very carefully. They MUST be within .002 of the pump cavity depth.
Too loose and line pressure will be low hot, and too tight, rotor and slide could bind, and break rotor, slide,converter neck,or all the forementioned parts. We set them .0013 in the hole, or in the "pocket". The way this is done is, the face is cut, or surfaced. Then another tool bit comes in and with the premeasured rotor and slide thickness', cuts it to .0013 clearence. This is VERY IMPORTANT!!!!!!