[olddog]

I am of the school that most people use too much cam and generally that is because they should have chosen better heads. I prefer a torque curve that is a flat as possible, but I want it to stay flat past 5000 rpm as far as possible.

That all said, I agree the cam would likely be dropping the torque way too soon with that many cid. I would go another 10 deg duration. Depending how adverse you are to a choppy idle, maybe a little more.

If you have fairly steep ramps with roller lifters, you will not need as much cam. If we are talking flat tappet lifters, you should be talking to someone who knows more than I.