I used a seal kit from NPD a few years back when I re-did my 68 top  mechanism. I had to manually help the top go up and down
The fluid reservoir had a lot of sludge in it, probably never serviced, the cylinders leaked internally and are not rebuildable other than the outer shaft seal.
I completely disassembled the pump and was meticulous in cleaning it putting new “O” rings and the provided parts in it and filled it with type “F” juice.
I ordered new oil lines and cylinders from NPD as well because I didn’t want to do a halfassed job and dig back under the seats when those inevitable snags happen.
I bench tested the rig before I installed it so I wouldn’t have to deal with “in car leaks” and refilling the reservoir and bleeding it in situ.
Hope this helps Ron.

Rudi wrote:

I used a seal kit from NPD a few years back when I re-did my 68 top mechanism. I had to manually help the top go up and down
The fluid reservoir had a lot of sludge in it, probably never serviced, the cylinders leaked internally and are not rebuildable other than the outer shaft seal.
I completely disassembled the pump and was meticulous in cleaning it putting new “O” rings and the provided parts in it and filled it with type “F” juice.
I ordered new oil lines and cylinders from NPD as well because I didn’t want to do a halfassed job and dig back under the seats when those inevitable snags happen.
I bench tested the rig before I installed it so I wouldn’t have to deal with “in car leaks” and refilling the reservoir and bleeding it in situ.
Hope this helps Ron.

Thanks Rudi for the info. I will talk to my neighbor and see what he wants to do about a system overhaul. Probably won't know a lot until we pull the pump and do a teardown.