There are other options without going to FI.
http://www.navioneer.org/riprelay/Th...es/Bendix1.pdf
And there is a float style horizontal carb (Marvel-Schebler HA-6) that came on several rear-induction Lycs.
I actually have a Lyc sump that's been converted from rear to front induction. I bought it to convert an O-360 A1G6 to front induction, then sold the engine when I decided to go over to the dark side (alternative engine).
The intake tubes seem to be in the 'correct' locations (unlike the C-series sumps) so that no mods to the motor mount should be needed.
I also have a bendix pressure carb in a box that's supposed to be serviceable, but I can't guarantee that (no yellow tag; I bought it here a while back).
Send me a PM if you're interested.
Charlie