Critial If your cobra is away for the winter, I am guessing that it is a solid lifter motor, Back off on the 4 rocker shaft bolts. This does 2 things, keeps all the valve springs the same rate and that none of the valves are open to let the cylinders rust. It's easy, takes 20 minutes. In the spring time just retork the bolts or nuts. DON"T play with the adjusters on the rocker arms. Put some rags in the side pipes to keep critters out of the pipes. In the spring retork the bolts, check the valve lash and road test
Rick Lake