You torque the rocker arm bolt down and that's it, no adjustment.
The valve lash is not adjustable on that engine. The rocker arms are bolted down and torqued to specs. If you have valve clatter you have worn valve train parts.
what year? Stock?
1979 ford 302 engine horsepower
You don't. The nuts that hold down the rocker arms are torqued down to specs and that's it. There is no adjustment. If you have valve train noise you probably have worn valve train parts.
usually .0020
185 stock HP
The most common place for a PCV valve is on the valve cover.
235 hp
10 foot pounds
I know that the stock connecting rod journal diameter is 2.123"
185@3800 RPM
The stock engine, a 5.0 or in reality a 4.9 liter had approx 225 horsepower.