Wow, that turned out great. I'm feeling more optimistic that painting it won't be a waste of time.
My short term plan is to have the drivetrain "ready to run" when it goes in. I know at some point I have to strip down the chassis for paint, but if I decide I want to build it out before doing that, I don't want to have to pull it apart just to do something that takes 5 minutes now. I know I'll forget something and pimp myself, but that's life.
Over the next few days I'm hoping to paint the iron block, pull the rear cover and replace the oil pressure barbell, rear main seal, and rear cover gasket. I need to pull the oil pan and put on a fresh gasket and seal the oil pan. I'll wait to do the front seal until I do a cam swap. I need to verify the flex plate matches my torque converter, too.
@Tom rebuilt my TH400 a few years back when I was optimistic about my finish date. It's been bagged in a corner waiting on me. From memory, I need to reinstall the shifter rooster comb, plug speedo hole, and swap the stock pan on instead of the chrome leaker, and trim the output shaft for the Atlas adapter combo. I guess when I unbag it we will see if I'm forgetting anything.
I think the Atlas is good to go besides gooping it up and bolting it to the trans.