Engine performance guys I have a question

[Dannyboy1966]

I have a 1986 GMC Sierra Classic, with a 350 under the hood. It's been a long time since I really dug into a motor, and as soon as it warms up I'm planning on pulling the heads and have them re-done they have a couple valves burnt. At the same time I've had some lifter noise the rattling click sound so I know I might have worn push rods, or a weak lifter or worn rocker arm. If my noise is from the push rods, or lifters do you recomend replacing all of them or just ones making noise? And if all of them should I go back with the stock lifters, or go with roller lifters? They didn't have them the last time i tore into a motor so it wasn't an option at the time. Thanks for any help.