Small block oiling issue

I tried the wire kit & it bottoms out on both heads. So it must take a turn down in the head. The #4 crank journal is the supply line to the cam,to the PS head. I am at a crossroad as to just swap in my rebuilt 340 or try & figure out what the deal is with this engine. I wasn't planning to do the the swap until I had the engine bay painted which wasn't until Oct. I hate to invest much $ into something that is going to be yanked in a month & put on the stand which is why I'm looking for an easy fix so I can still drive it until then.