you need more engine to get your power goal from that. that kit really is only capable of 5 to 7 psi. If your going for a turbo engine make sure you get a forged crank and rods as well as the forged pistons. Stock iron heads won't cut it. Boost is one thing but boost won't make up for horrible flow. So at minimum you should smooth the flow by porting the heads. But at that point with factory 318 heads I'd find something better.
Grab yourself some headers flip them side for side so they point forwards and mount ether a y pipe to one turbo or a turbo on each header, Increase oiling with an external system running to the turbo's and feeding the engine, increase oil flow through the block by increasing oil port sizes.