HEI in Mopar ECU casing
I would not. Just cut a flat piece of aluminum, you'd have to measure, but 3/16 or 1/4" thick, etc, and countersink the holes for the module mount from the bottom, or drill and tap the aluminum from the top. Then mount the aluminum flat on the firewall which will give you "a little more" heat transfer.
A bent bracket out of thin steel will give you very little heat sink.
DionR got it right. Going to make a bracket which the module will be mounted on. The mopar ECU casing will be mounted over and cover the HEI module.
I would not. Just cut a flat piece of aluminum, you'd have to measure, but 3/16 or 1/4" thick, etc, and countersink the holes for the module mount from the bottom, or drill and tap the aluminum from the top. Then mount the aluminum flat on the firewall which will give you "a little more" heat transfer.
A bent bracket out of thin steel will give you very little heat sink.