B16a head, LS block/89mm stroke, JDM B18C Pr3 piston = 11.3:1
on c-speed's com calculator and 11.6:1 with a two layer gasket.

unless this page isnt reliable, I would say it is possible. if you had a GSR head, you could see 11.57:1 on stock HG =)

http://www.c-speedracing.com/howto/c.../compcalc.html