I have a 72 Dodge Demon wit a 318 in it.....The engine is .30 over wit a decent cam..360 heads that have been worked...The engine was built by a guy that drag races out of Petersburg Va. Don't know much more than that....Although when I start it or when I drivin round people think it's a 340....Too bad I don't have the performance....I was lookin to up the level without goin to a 360 only cause the bottom end ain smokin and I have very good oil pressure....I kno that the head to engine combo ain the best....I was lookin to get a set of 302 heads and get them worked...What is the largest but at the same time streetable cam that would work good wit the 318? I want a good lope....I'm not exactly sure if the block been zero deck I think the guy did that for me....Also I was goin to go wit an air gap intake(Holley Street Dominator on it now)....650 Demon carb which is on it now.....What kinda power I may be lookin at? Any help would be preciated....