[crm318]

plugs and wires are new. the plugs are autolite 25s. i have heard that vortec heads take a specific plug, but i use the same autolites on all my small blocks.

Just to clear a few things up:
1. The carb is a 750cfm Q-Jet rebuilt recently, and run successfully on another motor for three months.
2. The fuel pump is electrical due to the year of the short block. The short block is out of an 89 silverado, and is rebuilt. I usually have shortblocks that take mechanical fuel pumps, but this is a first. My fuel pump is new and pumps at 4.5 psi.
3. There is an inline fuel filter placed before the fuel pump, and mounted at the tank as directed.
4. The HEI, plugs, wires, coil, etc are all new.
5. Now that the cam and lifters look ok, I'm going to readjust them properly, and... I'm not sure what the next step is.

To retract my prior statement, the vehicle bogs and sputters any time it is driven. When gas is given, it bogs and sputters. More when more fuel is delivered, but it's constant unless left at an idle.