Greetings, my 56 272 has oil return lines from the valve covers to the block.  The '64 292 I am installing does not have oil lines.  Does the 64 not have them or did the machine shop not use them due to the chrome aftermarket valve covers ? I have some slight lifter/rocker noise and I am wondering if its getting the correct amount of oil or they need adjusted. 

Thanks for any help.