That is going to depend entirely on how good the cnc job and original valve job was. If they were mine, I would find out who is super sharp in the porting business, and gets the most out of stock/superstock type heads. My reasoning is that the valve job is extremely important in overall head flow, and they will know what to look for in working with your engine/head combo.


8..603 156 mph best, 2905 lbs 549, indy 572-13, alky