273 questions...a few of them

Here is one more option. If there is enough room, you can remove the adjusting screw and add a lock nut. Then reinstall the screw. Make your adjustments and lock it down with the nut. You only need a nut about half as thick as a regular nut. Commonly referred to as a jam nut. I use this type of arrangement on my Hemi and it works fine. Here's a picture of what I am talking about. You have probably seen these before. Just be sure to use a good grade nut. SAE Grade 8 would be best.

http://www.ebay.com/itm/Rocker-arm-...1&item=150793562801&pt=Race_Car_Parts&vxp=mtr