Posted for Matt Reeves <mattreeves@yahoo.com>:

It's not the size of your prop that matters, it's the performance!!!

Lancair has done tons of testing on props for the 320/360.  I would stick with what they recommend
for your engine/airframe.  I believe I heard someone at Lancair say, "stick with what's been
proven".  I believe that was in reference to props and fuel systems. Nonetheless, it's your decision but I would check with Lancair a first - for safety.

Matt