Sorry don't have a Cobra but running an FE with a soild street roller cam and I don't know how revelant this is for those with the Al blocks. I'm using Crane Pro Series roller lifters which have a small oiling hole routing
oil from the lifter galley directly to the roller bearings. This is similar to the HIPPO option on the Crower lifters. I think even the standard Crane rollers have these oiling holes. Might be wrong on this though. My block has the hydraulic lifter
oil galleys but if you have the older blocks without these or the non hydraulic side oiler blocks this won't help. I had a big drop in
oil pressure after switching to these lifters from flat tappets (about 10psi at hot idle). I pulled the intake and spun the oil pump and saw a whole bunch of oil coming out of the roller end of each lifter. I had to put restrictors in the lifter passages and got most of the pressure back but still had a lot of oil going to the rollers. (When I checked with the flat tappets, very little oil leaked past the lifters) If you use these type of lifters with the oiling holes, it might be worth the time to spin the oil pump before you put the intake on to check your oil pressure and see if you need restrictors if you have the lifter oil passages. I have a few hundred miles on the motor with no problem. Also using the bronze gear with HV oil pump.
Hope this might be of some help and again sorry for imposing.