yeah it would be tough for Mike to get within range against Liston ... and Liston was a monster on the inside Mike had very good defense and was great at slipping the jab but is still at a major stylistic disadvantage against someone like Liston
Liston his punches were rather slow so the jab wouldn't trouble a "prime" Tyson too much. Tyson should just stay at his preferred mid range because his inside game sucked.