Even our somewhat mild iron MP headed 360 liked the 960 BG carb we threw on it. That combo set a best of 10.91/92's. One thing I'm not overly comfortable with (on the W5) is the stock block we had access to. We just plain ran out of funds for a race block so did the best with what we had. Our 340 block is filled and does have aftermarket steel caps (two bolt). We're hoping it lasts. we also left some hp on the table in the cam dept as we didn't want a high maint valve spring eater.