hi, I have a 79' camaro with a 350 in it. I think that most of the car is stock. i want to biuld a motor for it out of a 350 that will have as much HP as possible. I think the 350 in it is a 2 bolt main and from what I hear i need a 4 bolt main. so I think I'm going to start from ground zero and work my way up. Any ideas on how i should do it? and is a 350 my best choice? i would also like to get at least 8 miles to the gallon. I also want this motor to be able to handle nos when im ready.

Will nos lower my gas milage?