flopped straight

[Rex Bluett]

.5 $1 nl 6max
loose pass table
I ($175) have 97 [img]/images/graemlins/heart.gif[/img] on the button co (157)who is lag , but is up and carefull post flop limps I limp Sb (60)
completes BB checks
Flop 5 [img]/images/graemlins/diamond.gif[/img] 6 [img]/images/graemlins/diamond.gif[/img] 8 [img]/images/graemlins/heart.gif[/img]
Sb (lp) leads for $3 co calls
my plan is to call and try to build a big pot on a non [img]/images/graemlins/diamond.gif[/img] turn . Good plan or too weak?