[ChefKeith]

head gasket set, valve adjusting tools and books for 3.8 and 4.2 six cylinder engines

If You have a valve adjusting shim kit and cam timing gauge/tensioner tools to go with the rest of this You have about $600-900 worth of stuff there. Even more if it is the right brand (O.E.M.)

[Eric in the Ozarks]

I think I still have a half dozen shims and the feeler gauge, plus the copper plate that went over the cam shaft(remember 181 vs. 179 degrees)to make sure everything was correct. This copper tool was from Jaguar Cars and I was told to be sure and hang on to it. Its a paperweight now.
I owned (in the following order) a 1966 E Type roadster, a 1957 Mark VII, a 1960 150 S (gold head) and another 1966 E coup.