Hey guys, just got done freshening up a 440 that flattened a cam. Put new head gaskets on it, new cam, lifters, and cam bearings. While it was apart I put main and rod bearings in. Got it fired up for the first time last night to break the new cam in. Started great, and ran good for around 3 minutes. It developed a tick which in a fairly short period of time progressed to a full on knock. My feelings tell me it's a rod. I will be pulling the pan off tomorrow. Wondering if you guys any thoughts on what could be wrong and why? Little frustrated at the moment and my mind isn't thinking like it should.