I've seen a lot of L6's that run on low pressure, but never a high pressure issue. Do you really think you need 60 psi? I've got a high volume pump in my truck motor now, and it's always pushed 45 psi at speed with 30 idling cold, 15 idling hot. Of course I don't have the bypass plugged on a street motor, so I have no idea what pressure it would make plugged. But then again, I can't think of a reason why your rear seal would start leaking either. You didn't blow out the rear cam plug?
