I've ordered a complete pump that has the bearing, the old one had a thrust wwasher.

cleanup and endplay

The Carl Munroe book, building a Race Powerglide, is an excellent tool. You can find it online and at TRS Racing

My bad, TSR

https://tsr-racing.com/

Also, be sure to double-check clearances since you are changing from a thrust washer to a bearing.

Shoot for .010-.015 end play with a bearing. Hopefully the pump comes with a shim kit. Make sure the pump gasket is installed when checking

Thank you.
I did talk to the pump seller and got those instructions.