No one makes a low mount alt. bracket for a small block. I talked to DMI about it, he said he might make one at some point but did not have anything in the works.

I have the exact setup you are referring to with a Moroso electric pump. I used the AR Engr. brackets that came in the kit with the alt.

My neighbor is a machinist and he made me some standoffs to get the alt. to sit where it lined up with the crank pulley. They are counter bored to fit snugly into the water pump housing.