I’ve been trying for way too long to get my used 283 ready to swap in to my 40 coupe. It runs good, good oil pressure and compression, steady temp. I’ve replaced the clutch, oil pan gasket, timing chain and gears, distributor, gaskets, everything else stayed as is. Here’s the problem: several rocker arms are not getting oil. They did in the past as there is dry oil film on them. Pushrods are clean and open. Rocker arm holes are open, no sludge. No burning, discoloration or bluing on the rocker arms, pivot balls, pushrod ends, or valve stems. No lash ticking, so I’m presuming the lifters are pumping up(?) Could only a few lifters be sludged up enough in the cups to be dry? I would like to save myself some time and work and NOT have to pull the intake to change out lifters. That would make me want to get in to a cam change and PP heads. Any suggestions? Oil them up, run it and check for oil after so long a time? I’ve never had this problem on a SBC, usually it’s pumping and making a mess. And yes, I’ve worn out the search function without getting close. Thanks!