Check My Cam Degreeing
I never do what the Chrysler book says. I don't like touching the dial indicator that much and there no reason to do that.
If you know what the lobe lift is, just subtract .050 from that and check the degree wheel at that lift on both sides of the nose.
Let's say you have a lobe lift of .350. I'm assuming you have found absolute TDC and have the degree wheel correctly set to zero at TDC.
Roll the crank over until the lifter is on the base circle and zero the indicator. Keep turning the crank until the lifter reaches .300 lift (.350 lobe lift minus .050 is .300) and read the degree wheel. Keep turning the crank until you go past max lift and down the closing side until the indicator reads .300 lift again. Read the degree wheel.
Now you can do the math. You will have found the exact intake centerline. Which isn't always at max lobe lift. Which is why the Chrysler method of zeroing the indicator at max lift is a crap shoot at best.