Back firing out of carb

Unfortunately I think rustyratrod is on the right track. I'm pretty sure I got the distributor and timing right.

I'm thinking about tearing into it and re-doing the top end while i'm there. I'm sure it needs it anyway. If one valve isn't operating as it should the others are probably following like lemmings. I was hoping to enjoy the thing a little longer before I had to get crazy but that's life i guess. This would be the biggest project yet for me. Does anyone have any suggestions as far as resources? I've seen a few books out there on "how to rebuild the chrysler small block", but not a lot of detailed write ups on websites. I would really like to have everything I need in a nice pile instead of taking over the garage for a year

PS thanks for everyone's time, i can use as much advice as possible.