I took the cylinders/pistons off to replace broken head studs. Now, after putting the engine back in, it idles too high. I lowered the idle screw all the way(dual weber 44 setup), but it's still too high. Is there something else to adjust?
If you can unplug #3 or 4 spark plug wire and it has no effect then those 2 cylinders are not contributing to keeping your car running.
Your carbs are not syncronized.