popping at high rpm

I agree rocker gear and springs are a good place to start. I doubt you hurt the pump. Remember they only pump at half engine speed because it's cam driven. If you haven't already, pull the plugs and check for a closed gap or broken electrode. It's been run lean because you picked up 2 tenths by jetting up. Not likely, but easy to check. If your timing didn't change after this then i doubt you hurt the chain or distributor shaft. Was the valvetrain noisier after this happened? Even a stock bottom end and valvetrain can take a quick buzz to 7,000. I've done it, even a few times on purpose....lol. I'll keep thinking:-k and post if i think of anything else.

As a side note, what rpm were you "running out of engine" at on the top end? That combo should pull to 6K with no problem.

P.S. This is probably your cam.....
http://www.summitracing.com/parts/CCA-20-232-4/