I think I've been spreading some bad info.

The oil gets to the head on my lube diagram from an 89 Starion manual (which should be the same except for the oil cooler and turbo oil line stuff, which is all external) from the dside rear head bolt bore. The oil passage is right by the bore, and the head has a cavity to let the oil get to the head bolt bore, from which it enters the rear upper cam bearing, and then to the rocker shafts which feed the rockers, the cam squirt hole on the underside of the the rocker, the cam bearings, and by leakage out of the front cam bearing, lubes the timing chain and dizzy drive/driven gears.

Therefore, a leak in the front cylinder is from the valve stem seal/guide, the jet valve oring/stem seal, or rings, and can not be a head gasket leak from oil passage to cylinder as I suggested in your other post.

I would further suggest that while you have the rocker shaft off, you install a set of jet vavle eliminators, which are special bolts with orings that seal off the jet valve shroud in the combustion chamber from oil and air leaks. The jet valves tend to break off the heads of the vavles themselves, letting the stem jump up into the thrashing cam, valves/springs, and rockers. Mine managed to break a rocker, and hosannah that that was all. Runs just fine without them.

Rocker arm install note!!!:

Note the mating face of the upper and lower sections of the rear cam bearing. No gasket here. Pressurized oil goes thru here to the rocker shafts at gauge pressure. You have to put a light smear of rtv on one/both surfaces on clean metal before you bolt the caps back down, or you'll have an oil seep leak. You also have to make sure the perimeter of the rear rubberish cam bore seal (mitsu calls it the "circular packing") is also rtv'ed. Also use a dab of rtv in the square corners where the valve cover gasket jumps up over the rear cam bearing.

I'm puzzled by the oil at the head gasket outer side, but suspect a different valve cover or timing cover oil leak. You are also supposed to put a smear of rtv over the top of the timing cover/block joint, where the timing cover gasket butts up to the bottom of the head gasket. If you don't, and you don't do a razor trim of any protruding timing cover gasket too, you can get a slung oil leak there off the cam sprocket against that area from the inside of the timing cover.