727 Time to rebuild

Hello Team
My 360/727 has an unspecified amount of miles, who knows. Junk yard grab but when I drop the pan a few years ago it had some light clutch material, no metal shavings, had a little gray milky substance most likely condensation from sitting. Drained all fluids, added a new filter with new fluids, and rocked it. 1-2 shift is great can burn the tires no problem no slipping. Third gear however after it reaches operating temp sounds like it’s making surging sound and lack of power if I get on the gas. Doesn’t feel like a typical slipping scenario. Maybe a stuck governor or something. Anyhow I have the lokar kit and adjusting it is a pain in the ***. I set it for full pressure at wide open throttle. Now that I finally got sometime to mess with it. I’m either going to fix it or destroy it either way should be a good time.

I picked up a Transgo TF-2 kit and a MP deep pan.

what do you guys think of upgrading the rear servo?

Do I go with a solid billet one piece from randy or do I go with the more stock two piece version?

Does the one piece cause a clunk when putting it in reverse?

Also because of the questionable slipping scenario I will refill the trans with type f fluid instead of the +4.

Right answer is a full rebuild is in order but I’m trying to get as much out of it for now until I can get the body work started. Once I get the car in better shape I may replace or rebuild.

It’s just a street beater no track my motor is likely less than 275hp.
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