Wish it was a 360; I've got a 360 (A1G6, IIRC) rear facing that's been professionally converted to forward facing, that I'll never use. The intake tubes are slightly larger than 320 tubes, and (again, IIRC) would need small spacers due to the smaller diameter heads on the 320. I've been told that it should fit the 320 with the spacers. This is not the C-series with aft-positioned tubes; the tubes are in the same location in the sump as a vertical induction sump. (C-series won't fit most RV's.)
Charlie