trying to identify my Seacraft

[Blue_Heron]

If the transom is original, and there's not a hull ID number cast into the upper starboard side of the transom, it's a '72 or earlier. If it's a '72 20 CC, it's the SuperFisherman model. The only other 20 CC is the Master Angler, and it didn't go into production until '75. I believe the "FOB" in your serial number stands for "fisherman outboard". If it was an I/O, the SN would start "FIO..."
Dave