no oil pressure

ill get some pictures today and try to get them posted. Has anybody on here heard off these hollow pushrods. The ends don't have a hole in them. All ive got is 340 stuff and their all solid.
Iam about to figure out I don't know what ive got but I don't like it. Ill pull the rocker shaft today (sunday)on the 308 side and see what they look like. But I am sure I don't want a 308 head on one side and a 596 smog head on the other side. And to think I bought a complete crate motor from carb to oil pan tuned on a dyno so it would be a easy swap. what a joke. Now I ve got to pull it out build a crate and send it back then probably argue with them.