I am new at this so please understand if my questions seem dumb. I am trying to install a 350 in my 1981 Malibu, replacing the old V6, and I am having trouble finding new block brackets to bolt to the clam shell motor mounts. I ordered the clam shell mounts from Summit Racing and they mount onto the frame just fine. The bracket that mounts to the block is what I can not seem to find new. The ones I purchased were to narrow to go over the clam shell and I can not seem to find any other brackets that will work. The clam shells are about 4 inches wide and the brackets that I purchased were only about 2 1/2 inches wide. Do I have the wrong clam shell mounts? If not does anyone know what the correct block brackets are and where I can buy them? Any help on this would be greatly appreciated. Part numbers would be great. Thank You