As for your miss, use a voltmeter to make sure you have solid voltage to the ignition system; the ignition feed voltage ought to be no more than 1 volt less than what is coming out of the alternator. If ignition power is still running through the old wiring and ignition switch, then that is always suspect.
Is the fuel fresh? Has the fuel tank been cleaned out or replaced? Struggling at high revs could be fuel or ignition. Is this while driving the car or just revving in the driveway? If while in the driveway, then I'd focus on ignition or carb first as the fuel supply system is not being taxed too hard if you are not driving.
Just one dumb thing to check is that the exhaust is clear; old glasspacks can disintegrate internally and plug themselves up.
Just as FYI: The cam will not have 292 duration with 20" of vacuum LOL. Some sort of typo there on the cam data; nor does 292 advertised duration make sense with a 112 LSA. And just for info, while the pistons may say they are for 9:1, the reality is going to be around 8:1; the compression readings confirm that.
