it seems villain wants to level you into calling. i think you can only call such a bet when you play vs a bad player at 3,50$ who is on monkey tilt and who has no concept of ranges. and even then it´s very borderline.
 

cheers

s.

0.75P turn lead + overbet jam river where he thinks he can rep missed FDs & there are a ton of hands in your range which improved and are curious. 

This is 8x a lot.

Interesting hand.

Let me try and play the devil's advocate because I don't think the answer is as clear cut as you guys seem to imply. I am micro stakes though, so take it with a grain of salt...

First of all, the 8x is such a small part of BB's defending range. Assuming like a 60% defending range, he is folding quite a lot of 8x combos. (86o and worse, 84s and worse is folding.) This is a huge difference compared to something like Kx and Qx, where he is basically defending all of the combos. 

Second, when hero checks back on flop, from the villian's perspective it is very clear that hero rarely has any 8x. Generally speaking (as in readless), when both players check back on the flop, OOP's checking back range is stronger than IP because OOP needs a check raising range (that has some nutty hands), as well as middle pair/ draw type hands that are more likely to be in the check calling range than a leading/betting range. IP's betting range usually consists of  not only top pair+,  but middle pair, draws, and some k-high, a-high, basically a lot more hands can and are lead for value when in position compared to out of position. So when hero does check back on flop, especially on a wet board, it shows a lot of weakness.

Knowing this, villian can safely assume that hero rarely has any 8x, and I think this is compounded when bet on turn is just called. Villian could probably put hero on 7x, Qx, draws or random high card floats. So while hero's perceived range consists of basically zero 8x, villian's perceived range still consists of plenty of 8x because he could have easily had those trips in the check-raising department on flop, and by betting big on turn, and shoving river, he could still credibly rep 8x.  

Your quote: "Im representing A high so there is not too much sense to be bluffing here", that is exactly why there is merit to bluffing though. He knows you rarely have 8x, and both of you know he has plenty of 8x in his perceived range, so he can play extremely aggressive in future streets with ease, especially when no draws hit. In a sense, he can play any two cards like this when you check back on a wet flop, and be profitable majority of the time. I think good players can realize and exploit these gaps in ranges well, and I think you need to call with your made hand even if sometimes you are actually beat. Just considering BB's preflop ranges, and accounting for card removal when two 8 appear on flop, it is much more unlikely he has an eight. 

So calling at these kind of situations, at least in the long run, I think it is not clearly -ev, and I think it becomes somewhat mandatory as you move up in stakes and players become better.

The counter to this situation/ villian's aggression is to strengthen your check back range in position. (check back your nutty part of your range, in this case trips, a certain percentage of time)