Wow there is all sorts of misinformation going on here.....where to start?
I've seen factory stock cams with red and also white stripes marking them like yours. The lash pads are not what you need to worry about when you change cams; you need to make sure the wipe areas on the rocker arms are reground to eliminate the ridges worn in at the edges of the wipe pattern. Lash pads are only changed if you need thicker or thinner ones to keep the cam wipe pattern centered on the rocker arms when the valve lash is correctly set. The procedure for checking wipe patterns, lash pad thickness, and lash pads must be done properly every time you change cams, rockers, or lash pads. It's a tedious but necessary procedure; anyone who says changing cams on a z is quick and easy is NOT doing it right.
Replace your spray bar. Measure the damaged lobes on your cam with calipers and see if the largest diameters (taken from the base to the tip of the lobe) are different from the undamaged ones. If there's no big differences, I would recommend you keep running it as-is with the new spray bar. Since the engine is gonna get replaced soon anyhow, it's hard to justify the work and expense of replacing that cam unless you absolutely have to.