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Message: <blockquote data-quote="94twinscrew" data-source="post: 71981" data-attributes="member: 8280">I would go with a 331,with 165's(more street friendly,and more torque),Holley upper and lower,AFM B-31 or custom cam,(Ed curtis from Flowtech makes insane cams)..... this is what I would do.The biggest thing that you have to think about is what you REALLY want.....are you looking for a smog legal street car,or a weekeng warrior that see's the track,along with a little street time....but wont pass smog?400whp with the above combo is a given,actually(hell,you could hit that with just a 306)...it'll be closer to 440whp. Now crank the boost up to like 18psi,and you'll be over 500,and quite possibly still smog friendly. Do it the other way with the 347,185's,and a cam that can even keep up the the heads without choking them.....and you'll have a great track car,that will never pass smog......just something to ponder.</blockquote>