valvetrain components are what is always referred to as a "matched set".
Unfortunately, you are in a predicament.
You will most likely need to grind the tips of the valves when you replace the rockers, and you will also need pushrods, and possibly lifters.
The reason I say possibly lifters, is because depending on the quality of the lifter you purchased (with the cam or separately) they will already have a wear pattern from the ball seat of the pushrod. Certainly the camshaft and lifter base will already have an established wear pattern, but depending on the state of the pushrod/rocker and the preload you may find a need to replace more than previously thought.
These wear patterns which are pre-existing, will only accelerate any wear on a new components contact point that it is being replaced with. Truly unfortunate for you, as it means head off if the wear is "visible"
You could by all means simply replace the rockers and hope for the best, but they will soon be stuffed in no time flat, since the wear from the existing components is excessive - there should be no grooves in rockers ever. a slight surface dulling from extremely worn ones is more like normal wear pattern.
Even so, it is normal paractice to inspect valve stem tips with a high powered loupe and see if there is any abnormal wear / ridges. Anytime you inspect components and fine excessive wear on one part, it's corresponding matching component surface will be afffected.
From your description, sounds like it is well and truly gone beyond what is considered normal wear and as a result will be a more costly repair than previous.
Best suggestion is to have an engine builder / machine shop look over it before you rush out buying bits and pieces. Some things might be recoverable, and you may be able to save $.
Roads?.. Where we're going, we don't need roads...
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