Str8 on a flush board vs shortstack

No reads on player. Tables seems tight and it's 5 handed so I open up my raising range a lot.

***** Hand History for Game 4387092738 *****
$100 NL Texas Hold'em - Sunday, May 28, 23:53:47 ET 2006
Table Table 108716 (No DP) (Real Money)
Seat 2 is the button
Total number of players : 5
Seat 4: trubby ( $131.42 )
Seat 6: Beelzeboz0 ( $99.50 )
Seat 2: acvdub ( $23.20 )
Seat 1: nutsoverandover ( $32.95 )
Seat 5: ZonaBoy86 ( $46.05 )
trubby posts small blind [$0.50].
ZonaBoy86 posts big blind [$1].
** Dealing down cards **

Dealt to Beelzeboz0 [ Ah 3h ]

Beelzeboz0 raises [$3.50].
nutsoverandover folds.
acvdub folds.
trubby folds.
ZonaBoy86 raises [$5].
Beelzeboz0 calls [$2.50].

** Dealing Flop ** [ 2h, 7c, 4c ]

ZonaBoy86 checks.
Beelzeboz0 checks.

** Dealing Turn ** [ 6c ]

ZonaBoy86 checks.
Beelzeboz0 checks.

** Dealing River ** [ 5d ]

ZonaBoy86 bets [$8].
Beelzeboz0 raises [$24].
ZonaBoy86 is all-In.
Beelzeboz0 calls [$16.05].

Ewww, you have the ass end of the straight too. I would raise the river if I had an eight but with your crappy straight I'd just call.