Drivetrain 95 Cobra Transmission Replacement -- Any Tips?

[ksteak_5.0]

I'm losing my 2nd gear in my 95 Cobra and I just bought a used trans from another 95 Cobra that has only 38k on it, so I want to swap them out. I plan to do the rear main seal and clutch while I'm at it.

Any tips or tricks I should know about? Any common problems or challenges that you can advise about?