Well gentlemen, as promised, I'm back to report my findings with regards to my Metro with the fresh engine rebuild that was drinking oil like no other. After a slue of more urgent repairs on my fleet, I finally had time to take a closer look at said problem child. As it turns out, it was the aftermarket head gasket's inability to drain oil from the head back to the crankcase that was creating my problem. My solution, which has been covered by other forum members, was to use the old gasket as a template to cut larger drain holes in the new head gasket. The impressions left in the old gaskset allowed me to transfer the necessary size and shape holes to the new one using a cutting wheel on a die grinder. That simple! No more smoke at sustained high speeds, no more oil consumption through the intake PERIOD! After putting the poor metro through the ringer on the freeway, I parked it in the service area, popped the hood, removed the top half of the air filter housing, to discover an absolutely DRY air filter, DRY bottom half of housing, and DRY Throttle body. Thanks again for everyone's input.
-Matt