Bluff raising river

[JMa]

10/20 5-handed. We both have about $2000.

folded to me on the button, I make it $70 with 8s6s. SB folds, villain calls.

Flops is Jd 9d 4c. We both checks, I have done this with air as well as with a real hand.

Turn is Kc. He checks I bet $130 (pot is $160), he calls.

River is Qd, making a fourstraight and a 3-flush. He bets $325 I make it $1300. Would you drop the straight here? Comments appreciated.