So to get the blazer prepared for the reunion, I need to fix a couple of things. The two main things are the crossmember mounts and the rear drive shaft. Other things should include: notching the frame where a power steering hose hits and maybe try to figure out the weird power problem where half the vehicle loses power randomly.
So the crossmember is the biggest problem.
There are two mounts you can't see on the adapter in the picture. One of them is broken off and I don't think welding it back on is going to solve the problem for long.
My plan is to make two plates the bolt on the back side of the adapter where the blue scribble is. One on the top and one on the bottom. Then attach them ghetto like to some ghetto crossmember.