Van's called me back late yesterday and basically confirmed what was said on this thread, FM-150 will work with no mods to the cowling, FM-200 will not.
But, the air intake will need a modification!? The FWF kit is set up for AvStar system. Is there an after market kit for the air intake? Van's basically said it will be like putting a square peg in a round hole. Mod? Any feed back on that?
Another thing, after reading the thread from DanH, which refers to the 390 engine, will I need the FM-150 throttle/mixture cable bracket kit? Or will this be done at Lycoming? I guess I can make another call to them.