[OverBoardProject]

Talk to him, he's the expert.
The advantage of a rebuilt is that you can have a shift kit installed at the same time.
Plus he might give you the same warenty as a new one or even better.
The shop that rebuilt both my Blazers, and motorhome's transmission gave me a 2 year unlimited mileage warranty
They actually paid the shop where I got my motorhomes done to drop it again, since they somehow used the wrong gaskets in there

The advantage of a new transmission is that you know everything should be new, whereas rebuilt re-uses all the good parts