fordracer - I don't have any numbers to give you, because all the guys that I know that have Clevelands either have:
1. Totally standard "rebuilt" stocko boring motors,
2. Totally radical hi-port 4V 8,500rpm motors or
3. Yates / Brodix / Track Heats etc
Tony O'Connor from TOCA Automotive here in Brisbane have built more tough Cleveland motors than any other speed shop I know - here or in the States. His number is 01161732901606. I don't think he's ever built a motor that has less than .650" lift, 260 duration camshaft, so I don't know if he could help you with milder flow numbers. His own street car runs 9.2 @ 140+mph in a 3200lb car - no tubs, standard suspension, iron head Clevo, flat tappet camshaft, C4 Auto, 9"
