Tim,
Did you ever find out the reason for your high fuel consumption??
C-85 high fuel consumption
Somebody may have said this already( i don't have time to read all the pages), but I had an 0320lyc burn 11.5 gph on me once. It should burn about 8-9 max. It was on an IFR cross country and it almost ran me out of gas. Upon further inspection I found 3 intake leaks. When I fixed them the problem it went away.