Starter Solenoid Alternatives

[PGBuick]

I've just finished wiring a new custom harness and fuse panel in my '36, and have asked a few questions here. Responses, as usual, have been very helpful.

Next question:
First, some background. I have a 12V, negative ground system. All ignition power except the coil feed is going through a power relay, which is switched by the original Ford column switch. I have a 100A fuse in the main alternator positive wire instead of a fusible link.
The stock type 6v/12v Ford starter solenoid operates by grounding the small stud on the solenoid, in my case through a dash mounted pushbutton. This small stud on the solenoid is positive 12v all the time (battery positive), and grounding it completes the circuit and actuates the solenoid. This means that any time the battery is connected, the starter will engage when I press the start button, regardless of the ignition switch position.

My preference is to add a layer of safety by using a solenoid that is actuated by ignition 12V positive, rather than by grounding a hot stud. The stud on the solenoid, and wire between the pushbutton and the solenoid would then have no voltage unless I press the start button.

My question is when did Ford start using a solenoid that does not have a 12V positive small stud, or can someone provide a part number for a similar style (size, shape and stud location) solenoid that actuates by putting 12V positive to the stud rather than grounding the stud? I have seen some from early 50's that are similarly configured (for an F1 pickup for example) but I have no idea what the internal wiring is. Later solenoids from the 70's and up that I have seen use 12 positive actuation, rather than grounding actuation, but the ones I have seen are not the same physical configuration.

Thanks for any feedback and input.
Pat

[Brian]

Actually, in 1936 they had a floor mounted starter switch that you simply stomp on. Pure simplicity!

[OhioRick]

Some of the later ford solenoids did actuate with a positive feed instead of grounding.
Don’t recall the year but I’ve seen some aftermarket ones like this.

[flatjack9]

You need a push button switch with 2 terminals. Run a hot wire from the ignition switch to the starter button and the other to one of the posts on the solenoid. I think it's the post closest to the battery terminal.

[Bob C]

One from a 1956 Ford should work, you need one with a grounded base.

[PGBuick]

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Thanks! Found one!

[PGBuick]

Key word is grounded case.

[cas3]

If you do some searching you'll find you can still buy one with the manual button on it. A very handy feature I think. The part #'s are here in an old thread, Jseary I believe