Hi thauth,
D310, might this be a 4 cyl diesel fire in inlet manifold ( on left hand side ) 4599cc engine, lift pump on rhside camshaft driven, with hydraulic pump on same side mounted on timing gear chest and injector pump on lhside, siamezed exhaust ports on rhside meaning valves are IEEI IEEI configuration ??
Cannot remember what engine but potaro pampas crank had to be rotated 27 times from memory before timing marks realigned, gears.....
Might the 310 engine be fitted to 1984 ih 685...