Howard,
Not sure how motor mounts bolt to frame on Shell Valley car. You might have to have a set of frame mounts fabricated. Welding shop here in NoVa thats pretty good at this.
3 1/2" a bit low for
oil pan to ground clearance. 5" - 6" would be better. Mock it up so you have 3/4" - 1" clearance from the air cleaner to the hood with the hood closed.
My vote still goes to Energy Suspension polyurethane late SBF motor & trans mounts. Engine does not torque, but soaks up vibrations. Car, instead of just engine will rock a little when the engine is idling. Don't have part # but Summit does. There's only one.
Send e-mail to
jwalsh21@ix.netcom.com and I'll return some shots of this.