Both exhaust housings are the same so the powerheads interchange. No problem there but if water isn’t coming out of the exhaust relief, insects may have crawled up in there and built a nest. If the water pump needs servicing, the powerhead will have to come off and that would be a good time to make sure the water passage (blue arrow) is clear. You should be able to see daylight when you look down thru it.
The 7.5 cylinder heads have two Welch plugs and the lower one likes to rot out or fall out causing a leak. Water shouldn’t be coming out from under a bolt head either as the threads are dry and don’t go into the water jacket. I’d suspect a leaking or blown head gasket, P/N 203034 as the culprit. Or possibly the head is corroded thru into a bolt hole or it isn’t torqued down properly.
