360 Rebuild for 1974 Swinger

Hey folks, we finally got the block and heads back from the machine shop. We've been putting it back together, here are some shots. Sorry I missed the crankshaft and piston install pictures.

We hit a roadblock with with camshaft install. I think it slides back too far. Is there supposed to be a some kind of a stopper between the cam plug and the camshaft? The camshaft slides almost full inch back too far into the engine. The timing gear is almost impossible to put on because it slides back so far. I've poured over the forums but didn't see anything about a part between the cam cap and the camshaft. Also, how tight should the gear be? I don't think I can get it on without a hammer. The old one slides on and off easily.
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