check your spark plugs, My 89 BII had a miss, and it shuddered when pulling out, and it would MISS once in a while on the interstate, but it's a auto, turns out one of the past owners put the wrong plugs in , they where too short, I had changed out the wires, the cap, the rotor button, the coil, and pickup in the dizzy, then I changed the fuel pump, the fuel filter, and the fuel pressure regulator, and then had the injectors checked, and cleaned, I had also put new plugs, in BUT, I had took one of the old ones with me, so I also ended up putting the wrong plugs in, till I just went and had the Auto Parts store look them up for me, that's when I found out the plugs where 1/4 inch to short.
Robert