You can mount it off of the transmission I’ve seen guys remove the pto covers and bolt steel plates over the holes and weld there mounts to the plates. U could also remove that rear cross member and use your propeller mount. On mine my adapter had a mount on the botttom. For my linkage it’s just the stock linkage with a threaded hole bored into a piece of flat bar. I drilled one hole deeper into the flat bar to make it sit even on the side of the Tranny and threaded the post is off of the side of my old Toyota 4spd threaded into the flat bar.