[72 Super]

IMO. the Delco Marine boosters look better (they have the triangle shaped indention's all the way around the front of the booster, not that it really makes a difference.) They used the thicker oval shaped master with 2 bails running across the master cylinder holding the lid on.

The Bendix booster is more flat on the front and they used the skinner shaped master with 1 bail to hold the lid on running the length on the master cylinder.

Hope this helps,
Ray