sky

I have a real noisey tick coming from the top endof my 402 ls2. I was told that the Comp lifters are known to be a tad noisey. Secoundly, I noticed every once in a while no oil pressure upon start up 4 about 30 secounds, then it shouts up to the normal oil pressure. Mototr has roughly 1,500 miles on the complete build. Would bad lifters cause either or, or both? ? ? Or could it be a oil pump issue? Thanks in advance fellas! ! !