Engine stalls when you pull number 5 spark plug wire.

Have you used aerosol carburetor cleaner around the base and throttle shafts to check for a vacuum leak? Have you checked any of the vacuum port caps, if you have some for cracks? Have you changed out the #5 plug wire for a known good plug wire? My suggestions are starting with the basics.
I did test the wiring with some new good wires in the first place. I forgot to mention it. Still....Why would the engine stalls if i unplug the number 5 wire? I'll try the carb cleaner part this evening:thumbsup:

Is there a power brake booster hooked into #5 intake runner?
Nope, manual brakes.