Probably fold I would say.
Also note (gooper) this hand doesn't play bad three handed, even against a set and a big straight wrap, so you shouldn't be too concerned about being raised:
http://twodimes.net/h/?z=1273665
pokenum -o 3s ad 3c as - kh kd tc 9c - 8s th jd qd -- ks 9s 7c
Omaha Hi: 666 enumerated boards containing Ks 9s 7c
cards win %win lose %lose tie %tie EV
As 3s 3c Ad 203 30.48 463 69.52 0 0.00 0.305
Tc 9c Kd Kh 295 44.29 368 55.26 3 0.45 0.445
8s Qd Jd Th 165 24.77 498 74.77 3 0.45 0.250
Against two sets you're in great shape:
http://twodimes.net/h/?z=1273667
pokenum -o 3s ad 3c as - kh kd tc 9c - 7s 7d 8h 9h -- ks 9s 7c
Omaha Hi: 666 enumerated boards containing Ks 9s 7c
cards win %win lose %lose tie %tie EV
As 3s 3c Ad 259 38.89 407 61.11 0 0.00 0.389
Tc 9c Kd Kh 352 52.85 314 47.15 0 0.00 0.529
7s 7d 9h 8h 55 8.26 611 91.74 0 0.00 0.083
In total it's tough for you to be much less than neutral EV to get all in against two likely betting/raising hands, and there's obviously also going to be dead money in the pot, so this hand (because of its many nut outs) plays fine in more multiway pots as well as being decent heads up.