understand that you are going to have to engineer any system you put on your six as no one that i know of makes a kit fo any kind. i have seen single turbos, twin turbos, roots type blowers and centrifugal type blowers installed. something like a paxton or vortech blower should be fairly easy to engineer a mounting system on the drivers side since there is generally plenty of room there for the blower.
we had a guy on fordsix working on mounting a small roots type blower from like a thunderbird super coupe. he was working on mounting it on the drivers side down low and towards the middle of the engine, and was going to extend the drive snout as needed.
the hardest part is going to be the mount for the blower. you are going to use a lot of card board before you are finally done building the mount.
for teh blower i would recommend using the penco roots type blower as it is fairly small over all so it packages well. consider using a serpentine style belt in the gimler design(it has teeth built into the belt to help prevent slippage), and i would consider using EFI as well as some sort of distributorless ignition system. check the forums at fordsix as there is a thread that has the DIS system build, i think the read only forum.
hope that helps. let me know if you need more help.