The mounts I chose to use were the Speedway Motors Weld-In units. They fit very well with one small exception. On the 89' 5.0L block I have, the drivers side mount needed a small notch to clear a water jacket drain plug. (I'll post some pics later).
Here are a pic of the mounts.
Once I get everything welded in, I'll take some more pics. The mounts are built very well out of 1/4" steel with very good welds. I am very happy with the purchase. I had considered building my own, but after getting the steel and the urethane, it just made more sense to buy some. It appears that these use a Mustang II lower control arm bushing as the isolator. I guess I'll figure that detail out when they need to be replaced.
The next purchases I need are somewhat more expensive. I need a good compressor that has the capacity to do some blasting as well as run a paint gun in the future. It looks like most of the ones I have been looking at are in the $1000 area.
I also need to get a Argon/CO2 bottle since I am tired of the cleanup involved in flux-cored welding. I think I will most likely end up buying a bottle that way I can just do an exchange when I need a fill. Right now, I am torn between a 80 cuft bottle and a 125 cuft bottle. Time (and money) will tell.
I end up buying a lot of stuff from Amazon. If you do as well, you might want to consider getting a prime membership. It has quite a few benefits. The one I enjoy the most, is two day free shipping on the majority of things I purchase. Fell free to give it a shot. What do you have to loose with a 30 day free trial?
Have a good one.