Cam degreeing on a magnum motor

Hi all! I'm doing a cam swap into a 98 magnum motor. I'm overwhelmed with exactly how to do it on this thing. It's not a shaft mount like Toyota's or set up like other brands rockers with adjustment. That's what it looks like , right? I put a mild lunati .485 lift (1.5 ratio) 20200715 in it. So do I need a solid lifter and an adjustable pushrod to degree? Then prolly have to buy shorter pushrod set? These things eat money! Any help appreciated