sssssooooooooo... should i have led the turn?

also the guy turned over K4s in the end. how should this change how i play against him in future 3b pots? i know the simple answer is ranges, so if i have KK and the flop comes J-high i don't have to assume he has AA like 50% of the time yadda yadda yadda, but should i be widening my calling range? that seems like it could get us in trouble. dare i start to incorporate 4b's as bluffs? i mean the most immediate adjustment i make when i have someone 3b'ing wide behind me (even if they never do it as a bluff) is to stop raising 22-66 and JTs in the first two positions