PLO100 - Small rundowns v obvious Aces

[Elrazor]

SB is a complete donkey (79/26/2.3) - im aware you can get smart lags but he just isnt one loves calling down and only bets with the nuts, very readable. is this ok to call pre flop with this hand? and after doing so whats my flop move??

Cryptologic
Pot Limit Omaha Ring game
Blinds: $0.50/$1
6 players
Converter

Stack sizes:
Hero: $192.55
UTG+1: $96.50
CO: $201.35
Button: $84.50
SB: $189.70
BB: $149.72

Pre-flop: (6 players) Hero is UTG with 7[img]/images/graemlins/diamond.gif[/img] 8[img]/images/graemlins/club.gif[/img] 4[img]/images/graemlins/club.gif[/img] 6[img]/images/graemlins/spade.gif[/img]
<font color="#cc0000">Hero raises to $3.5</font>, 2 folds, Button calls, SB calls, <font color="#cc0000">BB raises to $17.5</font>, Hero calls, Button calls, SB calls.

Flop: 8[img]/images/graemlins/diamond.gif[/img] 3[img]/images/graemlins/heart.gif[/img] 6[img]/images/graemlins/diamond.gif[/img] ($70, 4 players)
SB checks, <font color="#cc0000">BB bets $70</font>, Hero??