Look in the picture where Bart's cylinder head bolt is, I used the studded head bolt that the ground cable usually bolts to and attached my turnbuckle to it. Also using a bolt with a stud on it you can use the front, middle or rear of the head to attach it to, my 69 GP worked better in the middle of the head due to the extreme setback of the engine, the upper A frame and shaft are in the way to mount it to the front of the engine. Of course if your using a studded block that wouldn't work out. I welded a 3/8' bolt to the frame and your done.
Mine was on my oval track car for 3 years and when I junked the car and pulled the engine the mounts were like new. I had broken brand new ones back in the late 70s when they weren't made in China, Korea, or Indonesia. My car was a 69 GP, and the left mount didn't have the limiters on it as the A bodies, etc. do. Actually those style mounts are interchangeable from left to right, one number fits both sides. That's how I did it when I didn't want solid mounts and thought I could find a better device than chain, the choice is yours....good luck with whatever you decide....