Pushrod selection

Are the pushrods long enough to have reasonable preload on the lifters?
They definitely did feel loose. After researching it a bit more I think definitely too loose.
Of course, these days the first question to ask in these situations is....... what’s the cam?
Several of the newer profiles are just kinda noisy.
It's an old cam. Been together since the 90s from what I can figure regarding the history of the car got it from.
valve height can change based on seat condition. non hardened exhaust valves tend to eat the seats so the valve gets taller under the spring. Slants are the worst at this, but they came with adjustables until well into the 80's. I'd cut and run from the stamped rockers/new custom pushrods/static lifter preload crap shoot right now and get some 273 rockers and correct hydro cam/mech rocker 340TA length pushrods. Then you can give each valve the proper preload it seems to demand nowadays.
If the valves were sinking would that not increase preload on the lifters?

I really appreciate all the comments and insights!

Cley