Not sure if you're aware, but the prices of these engines are going up. a 91K KA24DE is worth decent cash these days. Slapping a junky setup only to severely shorten the lifespan of your engine isn't a great idea. If you want a reliable setup get a Tomei cast manifold, a used T28, 550s, Z32 MAF, and a ROM tune. You could probably piece that together for roughly $1500-$1700 if you're patient and hit between 220-240 hp. I know you said you don't want to crack the engine open, but I'd recommend ARP head studs and a decent headgasket. That will be a reliable setup and you can continue to enjoy the car without constantly replacing parts.
I agree with what RustyS14 said that your power goals are not ideal with the setup you've got.
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