I need info on how to adjust the com cams magnum roller tip rockers on my 455. I have been trying to find someone here,but no one wants to mess with oldsmobile.So i figured i would get some guidance and do it myself.I am running the com cams extreme energy 284 hydralic cam shaft.duration 240/246 and lift 540/546 lift i believe.

 

This is the link to Crane Cams instructions...I could spend all day, and couldn't explain it any better
http://cranecams.com/?show=adjustingValveTrain

 

Except don't spin the pushrod, try to move it up and down, when you can't then go about 1/2 turn from there.

 

Be sure you have the correct length pushrods first.

 

Excellent point!