you can do as much with the b18a as you can do with any other b series engine.

I/H/E, raising your compression some and getting some nice cams (crower 403's come to mind) will make you run with gs-r's all day long or you can turbo it as is and have something that will be a lotta fun to drive.

just have to figure out waht your goals are and how much you have to work with.