after burnout it wont run

[7ft stew]

72 pontiac 350 with 2bbl q-jet in a 76 2wd blazer. After I did a burnout it was running very bad. It would idle fine but in "drive" it just boggs down when I give it throttle. I replaced cap,rotor and plugs. I was thinking accelortor pump would be next. The distributor is adjusted all the way towards the firewall,which is where it was before. After new parts,messing with timing and the air\fuel screws on carb it still runs bad. Any help is greatly appreciated