Yeah, I've been looking for exact information on loadouts and payloads vs range and practicality for all manners of aircraft for forever now, but hard information is extermely rare. I've found that Greg V. Goebel's invaluable
Air Vectors website is pretty good about disambiguating between what could theoretically be carried versus what could actually be carried, up to an extent, so that might be a starting point.
As for the GBU-39,
it's been in active service since 2006. The spec sheet says it is as effective versus concrete as a 2000lb Paveway, which I find difficult to believe, but that sounds like it'd be able to knock out just about any tank.