Finally, got some work done, been super busy with other stuff. The notch for the fuel lines has been cut in the bell housing. It finally goes into place nicely in the trans tunnel without hitting anything. I'm sure it will no longer pass SFI certification but that's okay, I don't ever plan on being fast enough to need it. I had some fitment issues with the torque converter, it wouldn't plug into the back of the crank but after I buffed off the paint that B&M applied to the snout, it went right in. Had to fix a few stripped out threads in various spots around the TH350, I'm sure the case is probably 40 years old or better, not sure I could expect anything else from aluminum that is that old.
Surprisingly, the aftermarket dipstick that came with the trans fit perfect in the truck, I was shocked. I'll upload a photo. Another thing that shocked me was that the crossmember bolted right up with the TH350 and the 1.750" spacer and the Syclone tailshaft housing. However, I did notice that the trans mount studs that protrude through into the center of the cross member are now sitting maybe .050" further back on the slots than before. Which means, I will likely have to shorten my rear driveshaft a little because I honestly didn't have .050" to spare, I'm not sure why but even when the truck was stock I always had a hard time putting the rear driveshaft in place, it just barely fits even with the truck in the air and the rear end suspended to full droop.
So for now, the trans is installed, hopefully it'll be in there for quite some time. I'm honestly tired of flat backing it with a trans balanced on a floor jack , it sucks, I'm too old for this shit. But, everything is tight and now all I have left is the new shift cable routing and adjustment. trans brake hook up, which I already did the wiring on a fused circuit, just need to hook it up, I need to have my buddy swing by the house, he always helps me stab the transfer case since we all know that it doesn't sit very nicely on a floor jack, and then some odds and ends and then time to test everything out. You guys have been a wealth of knowledge on this little truck and I appreciate all the help thus far.