Economical replacement rocker arm set?

So the exhaust valves are low. Are all of them on that side low?

If so, just find the low ones and put longer pushrods in those holes only.

At this point we are just going off the average stem height. We have no idea if they are correct. But most of them aren't making noise so they must be close to correct. We can see that the exhausts are low, effectively making the pushrods shorter and losing lifter preload.

The options are longer pushrods where the stems are low, or convert to adjustable valve train. Either will work. The second option is more expensive.