Clicking? Noise, while the engine is running?

so my uncle doesn't think it's the valves, just from the noise and how smoothly the car is still running. He thinks it's the lifters I believe he said. Although I have a new problem since now the car isn't starting at all.. gonna have to try and figure out what that problem is.

He's talking about the same thing, your 273 has solid lifters which make noise when the valve lash isn't correct. Just get some feeler gauges and look for some articles on setting valve lash for a solid cam. If you had a hydraulic cam and it was making similar noise the only fix would be to get a new lifter, as factory Mopar hydraulic valvetrain setups aren't adjustable (the hydraulic mechanism in the lifter adjusts by itself).