383 with zero oil pressure.

Yes if your lifter came out of bore your push rod is most likely bent too. So you will have a loose rocker arm on that particular lifter. As for if your oil pickup is bent, put like a clean piece of wood that is about 1/2" thick in pan. Your pickup should be about 3/8 inch off pan bottom. So with the 1/2 piece of wood in pan it should just almost sit flush on bottom of block. Also some people use plastercene in a baggie to squish and determine pickup height.