They would do pretty well. They were both very complete fighters, and Miske especially had a good track record against much bigger men. People are still making the transition from light heavyweight to heavyweight today, and these men would be good candidates to do it.
Neither one of them were championship material even in their day. Levinsky was a good, not great champion, in 1919 and he beat Miske in a title fight. Miske couldnt get past Greb, Norfolk, Gibbons or Dempsey either. He simply wasnt as good as his story. Gibbons was better than Miske but even he didnt have that something special to propel him to the next lvl when it mattered. Id say today they would win some and lose some, never reaching the championship. Lhw or supermw might be a more realistic class for them and there they would do well.
I agree with SQ's - oh so subtle - point though. I think these guys would probably out-monster the smaller guys. Both these guys could beef up to dominate 200llbs completely though I bet. Some good fighters there but that's my bet. At light-heavy, they'd do extremely well.
Given that you don't need to beat anybody close to the top ten to get ranked today, I am sure that these guys could be built into some sort of contenders. It might of course make more sense to match them in a lower weight class, where they would have a realistic prospect of holding a title (Wlad probably wouldn't want to share with them). Although Gibbons was better than Miske, he waged more of a small fighter campaign in the heavyweight division. Miske fought, and in some cases excelled against larger heavyweights, so we can perhaps back him with more conviction here.
