Chevy stopped using that mount as it was cracking the transmission bell housing on the automatics.
They came up with a rod that bolted into the holes on the side of the 205 and the other end bolted to the back of the block where the bell housing bolts too, to create a triangle to keep the 205 square to the back of the engine when under heavy load.
You need to hold the engine in two locations and the transmission and transfer case in a third position. A 3 legged chair always sits flat having the same pressure on each leg. Adding a mount to the side creates stresses that breaks stuff.
