The TPS that Powertrain Control Solutions sells is the best deal that I know of at this time, and I have quite a few guys running them as well as one in my Suburban. It can be made to work on any engine since it’s a remote cable sensor, and a couple different types of GM sensors can be used with the stuff that PCS puts together for it.
As with any universal type product, some fabrication is required to make it work with anything. They have been including a universal carburetor bracket but may not do that forever.
The part number is A-TCM-6000, their phone number is (804) 227-3023. I’ve also occasionally seen them on ebay.