[1977K10]

sorry for my delayed response been helping some friends out with their cars and working.
When I retested the seals and such I just charged my foot pump (as seen in the above pics) to 25-30 psi, I put the pump, the intermediate, and the forward clutch packs together, and introduced the air into the "system" I didnt have to put my finger over anything. I just had to make sure everything fit well together, and that the seals were all in good shape.
I hope this helped, if you do have any more questions I'll be glad to help.

My transmission will be getting in this week, I charged my battery yesterday and fired up the ole girl, and she sounded good.