Or before you do that you could hold the palm of your hand about 1/2 inch away from your exhaust pipe while it is idling. If one isn't firing you will feel a distinct and evenly spaced "puff, puff, puff" feel and then you can narrow down the problem cylinder.


~ Jon
1952 1/2 ton with 1959 235 | T5 with 3.07 rear end