...Re the oil capacity it looks like ther'e were things Lehman overlooked when they converted the truck and tractor engine to marine use. Not very smart of them to overlook the shaft angle element of the marine conversion...
It wasn't Lehman that overlooked the oil capacity but the boat builders who put the engines in. The Lehman Power manual specifically refers to either remarking the dip stick or shortening the "tube" that the dip stick goes into. The manual even goes as far to mention the need to de-burr the tube if you shorten that vs remarking the dipstick.