go to a Chevy dealership and get a 330 HO deluxe engine, it's gonna run u about 3.5k then take your 305 intake and get all the injectors and stuff to make it good enough for the 350, and then u can put on a bigger throttle body if u wanted, to make around 300 HP. you have to comply with NOX cause of it being a '96 with OBDII, so it makes it harder