ok, did not know exactly what motor you had. you could do the b 20 thing or do a ls swap and be happy with that granted you will not be up there as a real fast car but will be able to hang with a few. you say you would like to stay n\a, but with these two options and being that they are the less expensive swap you could put a spray on it but that would defeat the purpose of you wanting to stay n\a.