No specific reads on villain. I open BU and BB call. Checked flop with bottom two and pot raised this turn with nuts.

I think I should probably bet river? 75 might some portion of time donk bet river in villain shoes. Nasty thing I dont have any blockers to straight. So I suppose you could argue of checking this and bet-calling with blocker. What size would you use if betting river? Half pot? What if villain x-r?
