I swear to gawd, these guys here would rape a monkey if it would help them go faster.
You seem to be pleased with performance for right now. Make the
suspension better, you don't realize that you're driving a barge until you fix this.
Visit Maximum Motorsports, their sht is the best. At least get some subframe connectors welded in. You'll see. Then new bushings, or better yet, new rear
control arms. A nice set of shocks.
When you have that set up, then comes the big money of building up your engine (though a jy 351 I think is a really good route to go).
This way you'll have a car that can take the big horsepower. It will be doubly fun if you don't tear your car in two with a monster engine until it's ready to handle that.
Or you could just get a nice set of jack stands and a turbo kit as well.