Oil Problems ..
Anyways, have you checked the obvious like a double-gasketed oil filter? How about the drain plug either working loose or missing it's o-ring gasket? I've also seen the oil pressure sending unit have a diaphragm go out internally, causing leaking along the oil line. It doesn't make any sense that your car will spontaneously start losing two quarts of oil as quick as it does, nor just have a "bad pan gasket" unless you somehow damaged it with the header install.
You're more than welcome to come by and we can take a look at it, I'll also Autotap your car to see if I can pinpoint the excessive rich condition too.


