Rejetting a Carter 2-barrel

A friend from CA. that was a Mopar mechanic said to stretch the spring just a little. Forgot to do that last night, will see if raising the rods .018 does something. Going into town soon, will see.
I also have the part numbers for the grommets for steel or aluminum cast valve covers for the adjustable pcv valve.
They are 3/4", not 1/2". Summit carries them.