I picked up these tools from the estate sale of a 50's chevy collector. http://s830.photobucket.com/albums/zz230/19511979chevgmc/tools/ the one that looks like a screwdriver has a piece of tape that says "6 cyl valve adj" is it? and how do I use it?. then theres the big "thing" that I think is for magnafluxing. and a little ratchet, adjuster thingy?? that is stamped "K-D NO.339" any ideas?