40plo - River is a bluffing spot?!? or too suicidal?!

40plo - wpt gold - 8 handed w/straddle

160bb eff
+2 opens 8bb
loadsa callers including H in straddle w/ QJT9ccc

7way pot 62bb
Flop 7♦3♦8♣ all check
Turn Q♠ - BB(48/5) pots, Hero calls, +2 the pfr(30/15) calls

3way pot 248bb
River Q♦ - BB checks
Hero???
They both have like 80-90bb left.
Is it crazy to jam here to rep boats w/blockers?
I don't think we have any showdown value.
Say we just check this spot. What's our minimum bet for value range? Q3? Q7?