Very normal... the breather box bolts under the plenum and the injector housing bolts tend to loosen over time. The Lt5 creates so much crankcase pressure it tends to blow oil out in these areas. Mine was actually sucking oil from the oil gallies into the intake ports at the injector housing head mating surface. The 90's also tend to blow oil past the valve guides as there is no valve stem seal used that year.
Elgin huh... you know... we have a very active (but informal) ZR-1 group here in Northern Illinois. Hang out here on the forum and you'll see when we get together. A good group. Join us if you have a chance.
H
