i have a 93 5.0 with the following mods. stock block,gt40 aluminum heads,ported and polished, gt40 intake ,E cam, s trim vortech supercharger, 24lb injectors,255 fuel pump and trex pump. The problem im having is that the car is breaking up at about 4k rpm and im only seeing roughly 5-6 lbs boost. I changed the plugs to an autolite 25 and put msd wires on it. Any thoughts would be appreciated.