I have a TBI system from Performance Fuel Injection Systems (
https://pfisys.com/) on my Kammback. It works pretty good, is relatively inexpensive, and they include an HEI distributor with the kit. The last bit was important to me because I live in Colorado and wanted the system to control the timing also. I know there is at least one other Den member that has this set up. There is a YouTube video showing how to install their system on a Jeep which gives you a better idea of what it takes to install it. They rebuilt the throttle body and update the ECU. Their systems are available on eBay and they usually have a black Friday sale where you can save $100.
The only thing I would say on the neutral side regarding this is it is old technology. It is the GM system from the late 80s/early 90s so there isn't a lot of tweaking or even monitoring it once it is installed. Diagnosing a problem is achieved by putting a jumper (paper clip) in the interface plug and counting the number of flashes of the check engine light. Newer systems offer a screen where you can monitor key parameters.
There are the Holley and FiTech systems. If you live in an area that requires emissions testing, which can include a visual inspection to make sure all the emissions components are still in place, check out Howell EFI. They are the only one I know of that has gone to the effort to get CARB certified, and they advertise that it is accepted in all 50 stays as an upgrade for original equipment and the old emissions stuff can be removed. It is the same set up as the Performance TBI.
Good luck, let us know what you decide!