I want to pass this story along to you all. I feel that it's something that others may want to watch out for this.

About a month ago, I had the lifters, the cam and the oil pump installed in my A/C B engine. The engine is mounted on an engine stand. I have a plastic tray under the stand as a catch all. I put some assembly lube on and in just about everything when I assembled. A few days later, I walked past the engine and looked at the tray. The red assembly lube in the tray that dripped out of the pipe thread hole in the oil pump had dark streaks in it. I grabbed a magnet and pulled metallic dust out of the oil. 

I pulled the pump and the cam shaft. The hollow cam shaft had some crap inside. It was re manufactured and apparently it wasn't cleaned after reworking it. I got it from eBay and I don’t think that the seller was aware of the contamination. I cleaned it out with brake parts cleaner and blew it out with compressed air. I did the same with the oil pump. 

Now comes the fun part. Before I reinstalled the cam, I noticed that there were no squirt holes in the camshaft for oiling connecting rods. So, I took some measurements and drilled the holes, cleaned, and oiled it again, and reinstalled.

I'm glad that I noticed the lack of holes. It would have been a catastrophic failure.

The cam that I bought had the same casting number as the one that I pulled from the engine. Just because the casting numbers were the same, that does not mean that the part numbers were the same.

I read somewhere that they installed parts from some engines into others.

I found this quote from Dick L

Dick L wrote: Sort of pressure to the main bearings. No pressure inside the camshaft. The free flow oil is slightly blocked in the camshaft but not enough to build pressure. The centrifugal force pressure from the spinning camshaft sends oil to the main bearings thru the camshaft bearings. Same force the rod bearings get from the spinning crankshaft. They didn't put the spring and relief ball in the front of the camshaft until the D 10 thru the D 17 engines. Then the camshaft was not drilled with the little holes in line with the rods. The oil was then pressurized thru the camshaft bearings to the main bearings where the crankshaft was drilled from the main journals to the rod journals.