Horsepower and torque
We're just about finished building a 350 SBC using the 170cc RHS cast iron head. The intake flows well after a little work (265cfm @ ).600") but the short turn on the exhaust had to be modified. If I remember the exhaust flowed about 210cfm after we worked on the short turn.
This engine will be a "mule" motor to go on the dyno for R&D purposes.
Are the HP & TQ figures from the engine described here?