anybody with an idea how to play this hand?

Normally when he leads in this spot his range is going to be capped at overpairs and strong draws.  I would expect him to have like TT/JJ here alot based on his sizing, which is just huge. It depends if hes' bad enough to get in 300bb with JJ here?  As gross as it sounds I think you can call and evaluate based on his turn sizing, which he'll tell you a lot with.  If he bets like 500+ you're probably beat.  Especially on the Jc.   I would lead some of the time here on the flop also as I wouldn't expect btn to cbet this board much and utg2 is our main target in the hand. 

I think V1 will 3bet TT+ preflop most of time. Also don't think that he donks these weak made hands (vs. the BTN Range) this big as to a BTN shove he is way way behind. Most of the time this will be combodraws. This said I would vbet the river vs 56/45(/88/99) stuff in a small sized bet.

imo, you've presented him to us as a call-y person, so I'm assuming he's fairly passive.  i think its perfectly fine to fold flop on this hand UNLESS you think there is a large % of the time where he will attempt to check down hands like 88-JJ after you call his flop bet.  If he is prone to call many suited connectors pre, as aforementioned, he smashes this flop.  This is not a river decision obv and as such you need to factor in the possibility of facing multiple barrels.  Are you comfortable calling this guy down on this board? I don't think you should be.  Is he aggro? No.  It seems like he's not getting out of line too much based on your description.  That coupled with this board being one of the worst for your range and best for his and he donked for pot into the 3bettor and probably most importantly, the potential for terrible turn and river spots here is HUGE.  I mean literally every card in the deck other than the offsuit Q ball is bad for you.  If you think of the EV behind the scenarios of how this hand can play out I think you can argue for folding pretty strongly.  1)you are ahead otf, but he improves and you call down incorrectly 2) you are ahead all the way but you fold incorrectly later in the hand 3) you are behind otf and call down incorrectly 4) you are behind now and fold later 5) you are ahead now and he realizes all of his equity to the river, BUT you hold up and win at showdown

so you are hoping only for scenario 5, a scenario which is likely to produce the smallest pot size 

i think it is pretty clear that given the board texture, the sum -EV of scenarios 1-4 outweigh the +EV of scenario 5

I still like 4b pre with the stacks as deep as they are..
Im not to worried as to giving away my hand strength
we also will define there ranges more and are able to play a easier game post flop, if they decide to call..
As played call flop and fold to double barrel Jc turn with large sizing .

What was the action on the turn?

Why are we not c/r jamming on the flop? V1 donks 325 and has 900$ or so behind with a $900 pot correct?

Assuming that to be the case I would suspect us to have the best hand here alot based on hand reading. I don't think V1 has KK+ based on PF action and you said that you would discount sets and 2pair.

Seems like with a 1-1 PST and an over pair a c/r has some merit without reads.

seems pretty basic I think, raise if you think he continues with weaker pairs and flat if he doesn't

flatting pre is fine obv