I have an original 326 that I assume will need rebuilt in the near future and I was under the impression that if I put the HO 141 heads on my motor it will get me into the 285hp range maybe close to 300hp with upgraded pistons? I already have a 4barrel carb, hei, and dual exhaust. Just looking for a peppy cruiser. Just wondering if this all sound correct before I buy these heads for my build. I'm a complete novice by the way.