[olddog]

Ask the cam manufacture at what rpm will your engine make its peak torque and peak Hp. At these points what volumetric efficency (VE) do they predict. Also ask what torque the engine should be putting out at your cruising rpm, which should be between 2000 and 3000. First question is are you willing to turn your engine 500 to 1000 rpm past the peak Hp rpm they give you? If not it's too much cam.

Then find out how many cfm the webbers can flow. With your cid, the VE, and rpm that the engine will peak calculate how many cfm will be needed. Compare that to what your webbers can flow. If the webbers cannot feed the cam, then get bigger webbers or less cam. Feed this info back to the cam manufacturer and see what they say.