I just changed the plugs, points and condenser in my 56 chevy truck (235). I can't get it to start. All I get is an occasional backfire out the tail pipe. First thing I guess you should know is that I broke the plastic insulator on the outside of the distributor (where the wire from the coil connects). Haven't been able to find a replacement so I improvised with a thick rubber washer. Don't know if this is acceptable or if it's my problem or what, but I figured I'd give it a try. The stud is not grounding out against the dist. housing.
I have the BB on the pointer and the rotor set exactly to the number 1 position on the distributor. I used an ice-pick type test light to determine that there's no anti-corrosion material on the new points and that the points spring is not grounded to the base of the distributor. All the wires are in the proper firing order (triple checked).
Finally, I noticed that with the key on, if I separate the points there is not spark. Isn't there supposed to be a spark? Don't know if my improvised insulator was a stupid idea and is the problem or if something else is going on. Would appreciate any suggestions. BTW: The truck has run perfectly for the past six years.

Joe

1956 Chevy 3200