If it shifted on the road trip sounds like the valve body is ok.

I'd leave well enough alone unless you've had those 4 speed valve bodies apart before or have a good service manual. There is a very small check ball that many people lose when they split the valve body from the plate.

After building the trans and before installing the valve body I would apply pressure to the rear clutch port in the case. That will verify you didn't damage any seals during frt & rr clutch installation.