I replaced both cams when the rockers failed and badly scored all the lobes on the cams. You can take a chance w/ using old cams, but they will greatly accelerate the damage to the new rockers you install. Just replace the cams. You will need a "special" tool (about $90) to pull out the bearing/seal on the end of the cam, but if you are replacing the cam, just use a screwdriver and jam it against the cam to pull it out, or a bearing puller. Just be careful to not damage the outside surface where the new bearing/seal will go. You could probably reuse the end caps for the back of the intake manifold where you pull out the cams.
And replace ALL of the rockers/lifters. Play in the rockers = needle bearings have failed. You can find a set of 16 for around $400 on eBay from Europe. Don't buy them from a dealership - see these photos for damage I had:
