Year's ago, we would adjust valves with the engine running. We would back off the rocker until you could hear the clatter then tighten it up 1/2 turn. I've since tried this on my HO small block with new springs and pedestal mounted roller rockers with good success. I fashioned a VC with a slot cut the full length. With the engine up to temp and running, I would back off the adj nut to where it made noise,then TORQUE the nut to 22 ft/lbs observing how far it would rotate. If it went a full turn for example, I would add the appropriate pedestal shim to bring that travel down to 1/8-1/4 turn past QUIET with the torque at 22 ft /lbs. It revs good to 6500 which is past its useful range with no noise. This is on a my roller lifter HO sb. Any reason this method wont work on a BBF? I have my 460 hauler that I use to pull my 5er that will drop a cylinder intermittently when warm and shows #2 header pipe @ 330* with all the rest around 240 to 260. This engine had the heads pulled years back to have hardened seats installed and a "clean up cut" only. Perhaps one valve seat is cut deeper than the rest? This did it before with the iron intake so I thought maybe it was a distribution problem. I finally got my Performer intake on and same problem. Thoughts?
Thanks