340 Cold Valve Lash Unknown Cam

Ok, I am a glutton for punishment. I know you’re supposed to set valve lash close to running temperature, its 120°F in my garage so I won’t. I will set it at ambient.

I know you’re supposed to have a card for your cam, I don’t. As Schultz used to say I know nothing about this cam.

Engine: 340 AT, solid lifter with 273 adjustable rockers arms. Cam is aggressive. Compression high 11’s? Compression testing yielded 190 psi across all cylinders.

Given this I want to check and adjust valve lash as it is a bit noisy.

What valve lash (Intake/Exhaust) would you use and why?

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Well, "Down in Joe's Garage" we set 'em at .020 cold and tweek them from there.
That's with iron heads... aluminum slightly more.