How to degree a cam.

Hi all i`m a newbie to this site & This is a great site!!!!
I`m in the process of removing a 318 from my car (77 roadrunner). a few years back i installed the mopar .450"/.455" lift 268/272 duration. I`m using a set of 1973 340 ported polished heads w/ 3 angle valve job & cut .30

I installed the cam without degreeing it in & want to do so. while i`m at it, i`m thinking of installing a gear drive as well as an edlebrock tunnelram w/ 2 --450`s & Mr.Gasket street scoop. use to have a 340 4-speed dart with this setup minus the gear drive.

Anyone shed some light on the degreeing process?

Really appreciate it.

Bob G.