it is Positive Ground now...i.e. Positive/Red/+ Battery Cable to Starter Terminal...Negative/Black/- Battery Cable to Ground. This truck has had some serious "tinkering" prior to my getting it...lots of extra wires...some going to nowhere...toggle switches (from the 80's) added to the dash (no wires)...etc. will proceed with getting Ignition Resistor and trying the 12v start...fingers crossed
You need to understand what positive ground means. It means the positive/red/battery (+) cable is attached to a ground. Ground is the chassis metal.
You have said you have "Positive ground now"....but you have described negative ground.