Back in January, I had a 460 re-built out of my sons 79' F-150 ranger lariat. Shop that rebuilt is one I have made sure to voice to as many people I know, never to use again. in any event, it has been running, finally, up to this point, ok. But now I just discovered, by a familiar knocking and ticking, that my oil level is low again, yet no visible leaks on engine or ground and no smoke visible out of exhaust. I am looking for any advice I can get. Too many run-arounds from the so-called experts, have led me here. I am a novice, so pardon me if I sound a little ignorant, but I am learning and taking any and all advice seriously. At wits end with this thing.