i recently purchased a 91 si hatchback that i am putting a dohc zc in. i am wondering if theres any internals i can put in it to up the horsepower. the reason i am wanting to do this is so when people look under the hood they see a stock motor but when we race i whoop there ***.all help would be apprecitaed.

 

i heard you can use the LS internals but im not sure
stroke it if you can