If you do have a ballast resistor, it will be mounted on the firewall near the coil, over on the passenger side. My 1979 had one and I think the system didn't change that much.

It's an odd looking thing. Length of a cigarette, a little fatter, and tapered on both ends. Wire from each end, might be color brown. One goes to the coil, the other goes to a terminal on the starter.

when you find it, see how the car runs with a jumper wire across it.


Good Luck,

Bob

:>)