Lifters tapping away. Comes and goes at idle. Goes away at spool up. Got worse with oil change to 20w50. Reco's to quiet them down? Lucas additive? Switch to 10w30 synth? Live with it?

164k on the mill. Heads and pistons already reworked. Just replace the timing belt and front seal.

New truck to me but have complete maint. history and parts replacement records.