Advice Needed - Can't Start Rebuilt 273

Another update...I took the timing cover off the front of the engine to make sure all the marks were lined up, etc. Everything lined up, and the new timing set matched the old stuff I took off the engine, so that eliminated that. I then found the old cam that was in the engine before the rebuild to compare keyway position, etc. Well, after doing a preliminary look-see, it appears that this cam is not ground correctly. When you compare lobe to lobe, cam to cam, most of the lobes on the new cam are nowhere near the old one, so this may be a reverse-rotation cam, or a just-plain F*&%$D up one. We're removing it from the block tomorrow for a side-by-side comparison, and pictures so I can phone the grinder and give them H-E double-hockeysticks!!!!