Hesitation at 3000rpm

I bought a '70 Duster and can't get it running right. No papers and other info available. It's got a 383 bored out 30 0ver and stroked. Full roller top end with a wedge intake. Topped off with 2 4bbl holleys. I had to put a new MSD distributor in it to get it running. I opted to go without the vacumn advance. Now the problem is how to set the advance correctly. It boggs out at about 3000rpm pings little too. It's got fresh 93 octain in it. This isn't much info but any ideas would be appreciated. Thank You..