Reproduction of the Chevrolet Heavy Duty Engine Mounts
This part was used on many big block and high performance small blocks to resist breaking. Some applications have one used on the drivers side (this is the one that breaks). What makes this heavy duty is the interlocking "fingers". Engine torque can only pull so far before it the fingers contact each other, virtually making them solid mounts.
I had a small block 4 speed Nova that ripped 2 standard mounts apart, I changed to this style.
These are sold in pairs, because I believe you shouldn't mix brands.