I got a call yesterday and it was one of the guys I race with asking if I wanted a set of BBC heads. Turns out they were really nice but the valves look really small. They are 856 castings and I think they are off a 366 as the heads have 1.94 intake and 1.66 exhaust valves. The guy said he went to Brodix Race-Rites and his car is now a killer, well I can see why. These heads look to be the same as the 256hp 396 and 360hp 454 heads but with tiny valves, but have a super short side to rework on the exhaust side. Looks like a nice set of 2.06 and 1.72 valves are in order here. Anyone have any flow numbers on these early semi-open chamber heads?