LS motors are good for boost, because you have that lower comp. and long geared tranny, yet your head is pretty restrictive. For the same price of buying a used, complete vtec head, and conversion kit, you could buy a bolt on turbo kit. I spent almost $1200 on my setup and I coulda dont it for less! You could safely run 10psi on your motor with a uberdata/crome tune. Buy all this stuff

XS power manifold
XS power wastegate
Used saab/volvo T3 turbo
dsm denso 450cc injectors
255lph pump
intercooler piping
greddy style bov
28x6x2.5" fmic
2.5" custom d.p.
vacuum lines+t'ees
injector seals+resistors
uberdata/crome basemap
I think thats about it. You can get all that for uner $1000 and at 10psi on an B18B motor, tuned I have seen almsot 280whp!