[AZKen]

Oldred, glad you got it running but your whole ignition is not correct.
1.You don't need an electric fuel pump for a GMC V6 with 1 bbl carb. Use the original mechanical pump. (but they are pricey now). I'm amazed you found an electrical fuel pump that would not overpower the carb float needle on that carb. Are you using an electrical to start and then switching to Mechanical? If not, what is the toggle switch for?
2. You should not have "a push button on the starter". I really don't know what that means. Please explain that. The key starts the truck and runs the truck and turns on other things. NO push button anywhere.
3. I don't know where you got and HEI distributor for GMC V6 but would like to know. Did you build an HEI per Jolly's page?
4. A resistance wire or ballast resistor should not be hooked up to an HEI.
5. The proper key switch is 4 position with a momentary spring loaded "start" position. They do make a generic switch like that if you can't find an original.
6. You can damage the HEI and other electrical items.
7. You don't need a tach for a low RPM 1 bbl GMC V6. They are not hot rods.
8. Of course, it's your truck and you can do what you like.