BB Motor mounts & Frame mounts

[Pole Kitty]

I found a set of frame mounts on sale from Brothers for a BB in a 68 and was wondering if any one has them installed on their truck. Do they mount the engine in the same location as the original factory mounts do? I already have a new set of frame and engine mounts installed now that I got a couple of years back, but I am concerned if one of the engine mounts break, will I be able to find replacements. They weren't easy to find. I have the trans mount located and installed, the drive shaft has been cut to lenght and installed, so the location of the engine needs to remain the same.