May have screwed up installing new cam. Need help!

Thanks for all the advice everyone! My plan was to get out this morning, find TDC, and check my work before my BBQ. However, I got the piston stop out of the box and realized it wouldn't fit. I ordered the bigger one thinking it was the size I needed because thats the size of the socket I was using to get the spark plugs out. I've got the smaller one on order and it should be here by Wednesday or Thursday.

@Alfajim thanks for bringing that up. I was thinking maybe I should re lube the cam and re-soak the lifters. It's not that much more work to do it since I'm taking the timing cover off anyway.

One other thing to note. I had to turn over the engine in my Valiant by hand for another thread, and I realized I never heard any pumping sounds or air escaping when I turned over the 273 we're talking about. This is strange, as it was a running engine with good compression (cylinder pressures in the 150s) before I took it apart. I know we thought we solved this already, but now I'm concerned. All it's done is sat and I've never had the heads off. Any theories as to what would cause this?

Ill update once the new piston stop is in!