don't get it why you guys don't put a lot of attention on his sizing , he goes all in and he is a regular , to do that he should understand :
1. Your range
2. What he is trying to fold from your range if he is bluffing
3. What you are going to call if he is value betting.
First of all if he puts you on weak range on that kind of board it's most likely going to be :
pp's 8x,KJ,KQ,Ax and bluffs.
2. If he is going to bluff: he realize that he is probably going to fold out Kx,8x,pp's (99,77,JJ,QQ) and air with ANY BET SIZING HE RAISES TO : like say he make it 130 ~. Only consideration is wether he thinks you are going to fold Ax to a shove than a smaller raise.If he thinks u are folding to a shove , but not 3x raise than he might be doing that more frequently , since u got a lot of Ax hands in this spot. But given that u are unknown and he prolly might think you are fish , he got no info for that too and no real reason to shove a bluff , than raise a bluff to 3x-4x
3. Even if he doesn't think you got a value hand he anyway understand that if he raise smaller and you call , you are going to call a shove too . So he can just hope that u got some Ax,Tx or whatever you can call him down.
Also about his perceived range : I dont get it why we only comment that he can have a lot of bluffs here :
first of all on the flop he calls - 8x , Gutters , overs , oesd , fd's.
I dont think he is going to raise maybe all the strong fd's - say KQs,Ax's or something like this.Also he wont repop hands like JQo,KJo and stuff - Ax,8x. On the river however his range looks like : flush , Ax,Kx,8x,99 , I don't see a lot of hands missing there , since that we should rely on the assumption he is going to turn a lot of his Kx,8x,99 into bluff , and also have discounted amount of Tx,Flushes,straight into his range. Given the bad odds we got to make that true I think it's more a FOLD than a call.