I think something like the Piper Enforcer could work and would be an asset. I assume it would be a lot cheaper and easier to maintain compared to the A-10. It'd be a lot lighter and more economic, especially if you need to loiter a lot. For todays conflict scenarios it'd be great, back in the 80's they only looked at things that would fit a conventional full-out war scenario so it didn't have a real niche in the air force.
But casting aside nostalgia, you probably will go better with a purpose built airframe (a two seater) or by converting the Texan.