Truck runs fine at idle as soon as I let the clutch out and start moving I start to get some back firing. Once on the road shifting in to higher gears causes the same issue. I saw a thread on the needle valve should be #70.
The carburetor has been rebuilt, distributer cap is less than ideal, original with coil removed to the outside and a hole for the wire in the cap. Where might I find a new old stock cap? thanks in advance.