I second the timing.
Make sure this is set correctly. You could be 180 degrees out on the distributor, which would wet the plugs and stumble a bit. Or the oil pump spindle could be a tooth off which would cause your distributor to be way off. If I was to place a bet on anything wrong with it, it's probably the dizzy if off because of the oil pump drive spindle.
Set the crank at TDC, take the valve cover off, look at the timing mark there. Then pop the dizzy out (DO NOT DISCONNECT THE SPARK PLUG WIRES), look down the hole.
Look at this post for reference: