If you've never replaced the front bushing ..... the chances of getting it right the first 5 or 6 times by an inexperienced novice is practically nill.
FTR --- to replace the pump bushing, requires taking the pump totally out of the unit, taking it apart, inspecting the rotor/blades/housing/drive/reaction rings/side seals/pivot seal/etc and KNOWING WHAT IT IS YOU ARE SEEING ..... and this is just diagnosing, not repairing yet.
Buy a pump stator alignment tool, a new HD reaction drum, P&R or a Banner Kit, reman'd convertor, the newest/best front bushing design, staking tool, and this isn't talking about the extra long 3/8" extention (mine is 42") to access those pesky upper bellhousing bolts ... and a smoke wrench for those nasty exhaust bolts/studs --- and the hits keep right on a-coming for tools and stuff.
There are a lot of old timer SOP and "field-experienced" rebuilders who had their first half dozen or so, bushings fail because of bad technique, the wrong tool, the wrong press collet, too much hitting, too little hitting, incorrect staking, wrong staking tool, not using latest upgraded bushing, lack of cleanliness, too much beer, not enough beer ........
If you've never pulled a 4WD unit .... and I'm not saying on your back, laying on cardboard in a dirt driveway ... but on a 4-post 4 arm-hoist with a Wudel, air tools and inside a real shop .... you're gonna wish you had jobbed the whole thing to experienced professionals.
The R&R guy can destroy any good rebuild with bad technique ... even with a Haynes in one hand and a voodoo doll in the other.
I've exhausted my experiences and advice to you .... at this point, I have nothing else to offer you except consolations.
A nod is as good as a wink to a blind horse.
Have a happy day. Or not.