225 slant six choke help

I put an electric choke conversion on my 69 slant six decades ago. It bought it thru J.C. Whitney. Can't say it worked very good, but I had other issues with most of the Holley 1920's I put on it. It had a big black disk that bolted to the exhaust near where the factory choke sensor did. It had a little thermo-electric sensor that bolted to the head. I recall seeing new ones on ebay occasionally.

You might get a choke setup from a 74-76 A-body or 77-80 FMJ (Aspen, Volare), if they still used the Holley 1920 then. I recall they are similar to the ones on 318 engines (don't interchange!), with a heating element beside the thermostat coil and an external sensor/controller. I see the former new on ebay, but not the latter, and you need both parts.