Sorry guys, its torrential rain here for me to get underneath and take a pic of the braces-support rods. There are 3 of them. 2 shorter ones go from the frame where the motor mounts are to the bottom of the bellhousing. The long thicker bar goes from the block by where the starter mounts to, then goes all the way to the right side of the transfer case. Its mounted with two huge bolts, if you look you'll see the holes for these bolts.
I was told that withought these braces, you'll brake the tranny. So I measured them off, went to a wrecker that only does Chevy trucks, he had quite a few in different lenghts! The longer one I found. The two shorter ones I had to cut and reweld to get the correct length. Cant remember where I sourced out the bolts, I think I bought them new. I did have to borrow a tap to chase the threads so that they threaded in easily.
When it clears up here, I can take pics and post them if you like.