preload

hey, guys so I just bought a new cam and lifters that I'm gonna install in my 71 302. I wanted to see if yall knew how much preload I should go with when I tighten the rockers down? the cam isn't anything crazy here are the specs on the flat tappet.... ?Also is this a good performance...

Trying to tune and road test my '67 Mustang 289 V8, but for some reason, the POLYLOCKS KEEP COMING LOOSE, and not always on the same cylinder or bank -- sometimes left, other times, right. I'm confident the valve adjustment procedure and pre-load and zero lash have been done correctly (performed...