im with MI2fast. i have the same ones (vert mounts from AZ) and they are fine. as i recall, the vert mounts are interlocked, whereas older hardtop mounts can separate (that is what i read; i have never seen the latter).
Ford recognized that the vert mounts were better, so by 93 (maybe earlier), the vert mounts came on all stangs. if you go with AZ mounts, either ask for vert mounts, or ask for mounts for a 93 of any flavor.....same part number.
another benefit of urethane (if not mentioned): urethane resists oil and such more than rubber. but mine were about 1/3 the cost of urethane (two motor and one trans mount for under 50 bucks, IIRC), so i could not justify urethane.
good luck.