The heads pictured above belong to Jon Pose, and are Blair Patrick pieces. Jon and I just returned this morning from a trip to Jim Morgan's place in Faulkner MD where that pair of heads on a 520 inch BBM engine with a BBM tunnelwedge and a pair of 930 cfm Holley carbs did 964 on power and 816 torque@ 6,900 rpm. Some minor carb tuning delivered those numbers and needless to say Jon was happy with the result. Blair is still at Morgan's and this morning's motor, a 430 inch, 11:1 FE with a 735 carb did 717hp@7,000rpm. Blair may weigh in on both these builds but I am not sure when. I'll get some images of Jon's motor up next.
Jim M.