oh trust me, i know your engine well
. that engine is the very same that came in suzuki samurais since 1991 and is very very similar to the 86-90 samurai engine. my samurai was a 92 so the very same block/head/tbi/ect.
what i mean is from 91-96, suzuki sidekicks and Geo trackers came with a 1.6 8v TBI engine. the throttle body, injector, intake manifold and head have MUCH more flow to them. the 1.6 injector is a 468cc vs the 424cc injector you have now. TB is a 44mm over the 40mm you have. intake manifold has 3/16" larger runners and ports. head uses the exact same size combustion chamber but has larger intake valve and intake runner. the tech3 cam gives you a lope at idle and is like adding another 2 psi of boost to the engine. it flat makes its come alive across the RPM range.
130hp in my zuk that was pushing toyota axles and 35" tires was way fun over the stock 66hp. i had hit 90mph not trying one day (passing some traffic). it would make that little geo feel like a rocket lol