I know, topic has been beat to heck and back. I searched the forum and it seems to be based on your particular needs as to how much restriction to use... so here's my "case". My 390 is pretty pedestrian, rebuilt .030 over mild 268H cam, melling HV oil pump, stock C7AE-A heads with viton seals and hardened seats. Stock rocker assembly. This was my first 390/fe build and I used a stock set of felpro gaskets for reassembly. I noticed the felpro head gaskets had a restriction on the oil feed. Thinking this was a mistake, I punched the hole out to match the size of the port. Needless to say, I get lots of oil up top. To add to my issues I recently installed smaller oil filter to clear my sway bar, so at highway speeds I'm sure to be getting some bypass. After highway runs I now need to wipe the film of oil around the oil cap/breather and PCV valve on my valve covers.
For this build, what is a reasonable amount of restriction erring on the side of caution? Car is currently running fantastic and I'd really like this to be a onetime removal of the valve cover and rocker assembly's.. drop in the jet and be on my way.
