iron duke Oct 29, 2008 22:24:55 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by colemanracing931 on Oct 29, 2008 22:24:55 GMT -5 I think the Iron Duke was a 4 cylinder engine used in the early Pontiac Tempests(maybe others) & was based on the 389 cubic inch V-8 cut in half length wise.