[regamble]

Correct, getting the solenoid (relay) away from the heat is a major bonus, but also getting it away from oil leaks etc. As pointed out yes, please make sure to move the main accessory lead from the GM starter to the Constant Hot side of the Ford style solenoid. Look under the hood of any old Ford and it'll make perfect sense.

The "I" post on the Ford solenoid had been used for a couple reasons. One, as noted, it was used as a 12v bypass to the ignition system on cars with a resistor wire dropping the voltage to the ignition down to 7vdc while running. This keeps the coil a lot cooler and keep you from burning up points. Also, on some Duraspark systems, the "I" post is used to tell the ignition control module that the car is in crank mode which will then retard the ignition 10° for easier cranking. After a short time, Ford used the crank signal to the "S" post to retard the timing in the Duraspark box.