The only other part # I have that you may be able to cross over is Car Quest #31-2342. As far as I know the 351 w and 302 motor mounts should be the same, so the energy suspension mounts that summit lists for the 84-95 mustang should work (I think but don't know for sure
) Part # ENS-4-1124GX.
As far as the ground clearance, 3 1/2" does seem a little low (assuming you have your ride height set where you want) but should not be a problem. The main thing to consider, as Jack21 posted, is how much clearance you have between the air cleaner to the hood. You also need to look at clearences where the headers / sidepipes exit the body. If that all looks good you can shim the mounts up some or let me know and we can make you taller mounts. Either way one thing we like to do is, if you have an
oil pan with the drain plug on the bottom, relocate it to the side. This will gain you a little more clearance and help protect it a little more.
Hope this helps
-Dana