I have a 67 r/s camaro convertible with a s/b 400 I am installing the engine. With engine in the hei distributer hits fire wall I was thinking of moving the engine forward about .75 - 1 inch by re drilling the factory motor mounts that are bolted to the sub frame. I would also gain room for the heater core tubes clearing the tall valve cover on the right side. The trans is a 700 r4 which is not mounted to the cross member yet, I know I will have to alter the trans mount . any ideas?