Yes,propane can be great fuel,loves high compression,lots of spark advance. Has some downsides,like finding somewhere to put that big tank, having to convert it back to a gas to burn it,and has a tendency to burn out exhaust valves.Now given that the turbos heat the air up considerably as they compress it, you may be able to add the lp directly letting the heat of the air convert it. Could be very interesting! Hank