I have a doubled up 2x4 screwed together with ~8" piece of pine 1 x 2 attached to bear on the seam between the fender and apron for that purpose.

I use it with a 3/8" threaded eyebolt and short length of chain to attach to the rear most hole on a manifold lift plate. Adjust the nut on the eyebolt to set height. No problems with a BB when supporting the engine after transmission removal. I do use a jack and block of wood under the pan while actually pulling the transmission. In part to be able to move it up and down and in part to avoid overloading the engine support.

No damage to the fender... the wood actually rides on top of the fender mount bolts.