Then throw in a set of Rhoades lifters part # 2018
They bleed down at idle and tame out the cam a little more, giving increased idle vacuum, low end torque and power and add MPG. They fully pump up by 3500 RPM so you don't sacrifice the top end.
With a 60401 cam and Rhoades lifters, it should idle around 21" and have a strong pull from idle to red line. And you can part throttle accelerate without opening up the power valve to keep the MPG's up.
Go to the second article here to see how they work.