If I were an oil leak... where would I be?, sub question: does how you delete emssions cause a problem? Options

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Say you rebuilt your 5SFE from the ground up.... and say... you have the kind of oil leak that would require approx 1 quart of oil to be added every hour (Endurance racing conditions).. Where would this leak be coming from?

- *Every* seal on the engine is new (inc. valve guides)
- Most of the mess is on the transmission side of the engine / engine compartment
- Removing the access plate? the back of the flywheel looks dry / I don't think it is the rear main seal

Other interesting tidbits:

- The PCV has been deleted and replaced with a little cone filter... should this be replaced with a catch can?
- The EGR has been deleted and a large bolt has been used to block the port... has anyone deleted EGR and if so how did you do it?

Is anyone running a proper oil pressure gauge? What are you getting? @ High RPM and high load and when we are full and cold - we are high (60-70 psi) As we warm up, it drops to 50 psi or so... and then we lose oil until things get very low... 40 psi or so.