I may have literally boxed myself into a corner here. I’m not certain the engine side motor mount will be able to get out of the frame side here on the DS. We’ll see if changes need to be made.
Most of the plate shown in the recent photos is 1/4”. The blade coming up from the engine mount and bolting to the matching plate on the bushing is 1/2”. I do the rough cutting with the portaband and then sand on the belt sander. I’m a huge fan of the portaband and use it for all my cutting whenever possible.
It is thick, no argument there…but it’s also cantilevered and held in single sheer on a stress plane. Going 1/2” gives more bearing surface on the bolts, resistance to elastic deformation, blah blah blah, plus it’s what I had on hand.And 1/2" ..that's way too thick. I will use 0.1" or 0.125 for engine mounts. This is the thickness of the metal used by BMW (E30) for engine mounts.
I had 4” of clearance with the stock engine which seemed like nothing.Wow! That is way low.
I know of people running E30's smacking their oilpan on curbing when on track (VIR, IIRC). Don't know what the ground clearance was. Anyways, oilpan cracked (cast aluminum), repaired with JB weld, and back on track next day. I guess the benefit of a steel pan is, if you smack it, the oil wont bleed out. Off-roading happens.
Do you plan on raisng the engine? The hood is probably curved so there is probably even more room than shown in the image you posted.