Quote: the b1 originals will put a wippin on any of the indy heads including 572-13
I look at how long the valve is. This is the best indicator how much power a head will produce. B1s have the longer valve, but the rare Brewer head has even longer valves and is superior to the Original B1 by 20 or 30 cfm. The 440-1 is good for a stock valve location and size head, but falls short of the B1...the 572-13 Indy just has'nt produced the power it should... maybe the valve length is to blame?
On costs, the 540" B1 in the Cuda costs about 13K to have built..that included dyno time. And the motor was "all new", no old factory parts..,it was built by Schofield Machine in Clinton, MO
I look at how long the valve is. This is the best indicator how much power a head will produce. B1s have the longer valve, but the rare Brewer head has even longer valves and is superior to the Original B1 by 20 or 30 cfm. The 440-1 is good for a stock valve location and size head, but falls short of the B1...the 572-13 Indy just has'nt produced the power it should... maybe the valve length is to blame? 
