Cheers for the responses, at the time i just really didnt know what to do here.
I think his range is about equally as likely to be a flopped flush as it is a big drawing hand or pair and FD. I assume he would prob come over the top with a worse two pair and bottom set on the flop. Didnt want to just check back and then get bluffed off the pot when a scare card came on the river, which is kind of like 3/4 of the deck.
After a dwell I decided to bet 22.5k and he pretty quickly shoved the rest in for 27.5k more. Now theres 114.4k in pot and 27.5k to call.
I eventually made what i now feel was probably a bad call, although a few ppl have said that they would play it the same way. All those lovely green thousand chips staring at me from the middle of the pot were far more attractive than folding and grinding my arse off. He flips over

and i need to catch any pair up to scoop. Thankfully earlier on in the day i had brushed my jacket past Blatch and therefore binked a

on the river to rake in a nice pot. MBN?! Yeah it is.
i later found out the other guy is a massive rock and obviously if i have more info like this on the guy it becomes a pretty easy pass on the turn as played.
Cheers, Mitch.