Panic,
I'm running the stock #983 head with minor porting. The biggest gains were from the 2.02/1.60
SB Chevy valves and a lot of combustion chamber work. I still haven't flowed the exhaust ports yet cause one of the guys cleaned the flow bench and it doesn't work now. I'll try to get it fixed and calibrated this weekend. I opened up the intake ports to the size of the alignment rings and just cleaned them up.
Based on intake flow numbers (260-265 cfm) the head is flowing enough to make the HP I'm looking for. However, the exhaust is a big unknown at this point. The last time I flowed it max flow was in the 150 cfm range and flattened out about 0.500" lift. That was one of the end ports. I'd like to see 175-180 cfm then try to get a good working header. I still haven't determined what the best header configuration should be. The shape of the exhaust ports are very close to stock, now much has been done to them yet.
Ron
