[RichardJ]

Ford solenoids are over-kill, ugly and have the large posts hanging out in the open waiting for you to drop a wrench on them.
The Ford starter solenoids in some cases can handle as much as 300 Amps and may require as much as 5 Amps to energize.

The small Bosch type relays require less than 50 milliAmps to energize and many can handle 30 to 40 Amps.

I get mine from the wrecking yard. On GM cars from the mid '80s, up through the '90s you can find as many as ten on a single car. I pick the ones that have two or three 12 or 10 gauge wired to them and I know they are at least 30 Amps. Get the relay, plug and as much wire you might need. Usually a couple of bucks each and they have a low failure rate.
Get matching relay types and use a bank of them for fans ,headlights, AC or whatever.