Thanks Deejay, I'll try not to stuff it up too badly.

found this site with some good info on the flojets.

http://outdoorpowerinfo.com/repairs/briggs_medium_two_piece.asp

This appears to be the carb which is currently on the monster.

[Linked Image from outdoorpowerinfo.com]

Whether it's supposed to be or not or was an option is yet another mystery.