I use all ARP bolts - never a problem. BUT - I have torn the so called bonded elastomer, made-in-Korea crap apart. Now I drill through the entire assembly, add two Gr8 5/16 or 3/8" bolts just snugged to the metal and use a nyloc nut. Solved that problem by limiting the travel compression/rebound. As far as adding any vibration - haven't noticed.
The new motor mounts - actually found some Trade # 2257/NAPA#602-1151 made in the USA replacements which are used in most Fords through '72.