That much consumption should be visual, especially on start up if all the oil was going out the exhaust. I think you have a few small oil leaks that are adding up, as well as maybe some leakage through the valve stems. What does the #3 cyl spark plug look like? If it isn't caked in oil, you can eliminate the rings caked in oil
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Quote:I would pull the manifold and if the heli-coiled repaired studs don't work, just re-tap using a standard tap and stud, just a little bigger than the oem metric ones.

Is this refering to the head/manifold studs or manifold/downpipe studs?

I was referring to the exhaust manifold to head studs. It doesn't take much to re-tap them to accept the next standard stud(the size would fall between the oem metric and the next metric size). Usually you are able to simply rethread the stripped oem hole, you shouldn't have to drill.

More than tread lightly. Leave it like you were never there, nor anyone else.
'90 X-cab 4.88's 33 BFG AT's, rr ARB, Headers, Ignition upgrade, cold air induction.
'91 X-cab 5.29's 315's BFG MT's, rr ARB, custom bumper and flatbed