Designed to mount our profiled big- and small-block motor plates. These scalloped motor-plate brackets are made from 1/8"-thick, 4130 sheet, which is laser-cut and shipped flat. Its bolt pattern matches that of motor-plate adapter 6047. This bracket is "folded up" to form a ledge, which holds the motor plate. The backing-doubler washers are then welded to the back to strengthen the bracket. The bracket fits 1-1/4" tube. Ideal for chassis that need to except both big- and small-block Chevy engines.