Heres my progress from yesterday
I had a good th350 that 3 bolt holes had stripped out on the back. Needless to say with only one holding good and a t-case bouncing around it broke the corner off. Had a friend with a tig machine weld it up for me yesterday and I tapped all the holes to 7/16s.
Used Loctite on the bolts and silicone on the adapter to stop any leaks.
I had my hoist tied up with the old scout motor (someone bought it yesterday for a pretty nice scout restore) so I had to do something else while I waited
Dug through my a/c coil pile and found a decent sized N coil and removed one of the sides
I tried to pull the capillary tubes out of the bottom and just weld a u-tube to utilize the hole thing but I cracked the tubes when I tried to open them up with a swedge so I took out the bottom two rows and welded in a crossover
Don't let the pics fool you, Im actually really good at welding refrigeration lines, just did a crappy job this time. Its ok though, these coils and my silver solder are designed to handle like 500 psi and it didn't leak under pressure after I modified it so Im sure it can handle transmission fluid.
I lucked out and the other end already had 5/16s lines that match the factory tranny cooler lines so I just flared them and will use a union to connect them
And heres my completed transmission cooler, its like 12x15 and 1.5" thick so it should do a good job cooling. I also still need to cut off the bottom row of tubes that are no longer in the system.
Then the guy showed up to get the motor and cleared my hoist so I installed the transmission
Easiest install ever, didn't have to get underneath at all, though I will to bolt up convertor and run the cooler lines. And the factory driveshaft is about 3 inches from the output of the tranny without the t-case attached.
And heres the t-case that I installed through the top

and you can see how much too long the driveshaft is, have to have a slip yoke anyways.
Still have to build a crossmember, run transmission lines to the cooler, build driveshafts, and shifting linkage but Im getting closer. Also going to try running tractor fluid in my transmission. Been doing a lot of research on it and even talked to a couple builders that said it was a good idea. Got a 5 gallon bucket for $25 yesterday

A 5 gallon bucket of regular dexron is $125 at my local parts store.