Cam woes part II

[Desertson]

I began assembling my new 393w yesterday and its already getting ugly. For starters I found out that for some reason flatlander racing gave me a set of piston rings that are fully a tenth of an inch too big with the kit I bought from them, a little odd since those would NEVER go in a factory small ford block. That was resolved easy enough, but now I have a cam problem. My Comp Cams XE284H cam (see my other thread) slides easily into the block and rotates smoothly and easily for all but the last perhaps 1/16" of its way into the block, ware it seizes in place and refuses to turn. I inspected the bearings thick were installed by my machinist and there doesn’t seem to be anything wrong with them. I tried in the ford factory cam that I took out of the block when I got it and it too seized when pushed far enough back, but it did spin freely and smoothly with the throwout bearing installed and could even go in a little further with no issues. The journals on the comp cam are considerably wider, but when I miced the diameters the new Comp cam was a little less than .001" larger in diameter (Just did a real quick check of the last journal). Honestly I've built a few Chevys before but this is my first Ford, and I know that the for cam set up is quite a bit more complex than Chevy's. The only thing I can think of is to pull the cam plug out of the back of the block and see what that gets me. Am I missing something? thanks... Mike