82ACAUTOCRAFT You can't compare apples to bananas here. Iron block new or old style good for 1k horse power. Shelby block good for 2,000 HP, Ponds or Gen's Have been told 1,500 hp. The engineering of these blocks will make them 1/3 lighter, and twice as strong. All the extra ribbing and support in the Alum blocks puts them ahead of any iron block. For orginial motor look, even the new blocks have added support built in (IRON). Rick L. I have 2 Shelby motors and the expansion is no problem. Have plenty of room under the hood to breath. Might even go to a SOHC with one of my blocks.
