Who knows factory cylinder heads ?

Bodyperson said

Yes you can add adjustable rockers to hydraulic lifters. You MUST have adjustable rockers for solid lifters. Are you sure you have "up and down" play. You do realize each pushrod has to be checked when the lifter is on the base of the cam well into the compression stroke. Lifters that are in the lift position will be tight as in "you can not spin the push rod" others on the compression stroke can be spun as they are on the compression stroke and the valves are closed. If the engine runs good and nothing is "clacking" dont sweat it.

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I understand this. The thing is. 2 of the 3 rods spinning are on the same cylinder ? Yes, 1 of the 3 has enough slop that it doesn’t touch the rocker if I move it up and down. Roughly, 2 millimeters. The other 2 that spin have no gap between the rocker or lifters. So, those other 2 are slightly loose, but ok. What’s a good set of adjustable rockers to be added to a stock rocker arm ? I understand, that hydraulic lifters are not likely to move due to oil compression inside them. Having said that though, 1 of the 8 should barely move enough if I press down hard enough, to verify they are hydraulic. I’m thinking. Because it’s very common for hydraulic lifters to leak down. At least 1 of them. I never looked at driver side cylinders.