the ecu could care less where the distributor is located.

place a mechanical gauge and measure you oil pressure at hot idle and at hot 2000-2500 rpms using nothing heavier than 10-30 oil.

if the pressure is with spec forget about changing the bearings.

does it use any more oil within 3000 miles of driving than a quart?

no forget about rings if the compression is uniform and within specs.

imo you're utterly wasting your money on synthetic oil. its an old engine designed well before synthetic oils came into widespread use. dinosaur oil is just fine for a b230f.

not long ago i tore down a b230f na engine with just under .5 million miles.

the main bearings showed no visible wear and neither did the rod bearings.
the cylinder walls still had crosshatching visible. the oil pressure was 46 psi at hot running speed and just a tad lower at hot idle. i wasted my time ripping it down thinking i ought to replace this and that. and it was from a 1990 240, 3 years before oil squirters were introduced