well there is no brown wire on this truck anyways so i will have to figure something out, but do i want full power on start and then resistance during running? or do some coils want resistance all the time?
thanks
You should have two small pins on your starter relay. One is marked "S" and that's the one that comes from your key and energizes the relay for starting. The other is marked "I" and is your ignition jumper.
If you don't have a wire there already, you can buy the new push-on connectors at most autoparts stores and make your own "brown" wire.
Unless you have a super-duper ignition system already, you usually do want a little boost during start to give you some extra spark power and easier starting. It's not absolutely necessary, but in older systems it does help to fire things up quicker.
I'm not aware of any coils that require resistance/lower voltage all the time. It won't hurt anything to have more voltage just during the starting process. You can even run full voltage for some time if you have to.
An example of that is if you ever lose power to that circuit and don't have the time to figure out why, you can hook a jumper wire straight from some other source right to the coil. Won't hurt a thing in the time it takes to get you home.
If it does, then your coil was about to go bye-bye anyway.
The only reason coils want less voltage going to them is so either they, or your points and condenser don't overheat or burn out. It's not an immediate thing though, so it won't hurt anything to be running higher voltage for mere moments.
Paul