Okay, first and foremost before you do anything...HOOK UP THE O2 SENSORS!!!!!!!!!!!!!! An engine running with no O2 sensors is like u running for 5 miles breathing only through your nose with one nostril clogged. Was the O2 sensors hooked up in the lincoln when it had power and ran right?? (Yes) A computer will regulate fuel pressure, timing, and power through feedback of the O2's. Like previously said, hook em up, disconnect battery for 10 minutes and then start and warm it up so the comp can re-learn.
Also, the 4, 6, and 8 cyl EFI setups (with the exception of forced induction vehicles) all used the same volume fuel pump (88 LPH), so its not that. No O2 sensor will cause a lean A/F ratio, the reason why it runs better when the FPR vacuum line is disconnected. Your readings/measurements seem normal, but again, without the 02's they will be off...
Exactly what emisions did you delete from the system?? Did you delete the EGR plate, or just disconnect it?? To gain the most from the engine and remove the power robbing emissions, connect everything except the smog pump. Back in my mustang days we used to bypass the smog pump pulley...deleting any more than that and we always ran into problems with the engine running right. Try that and we'll go from there
SVT