Push rods that are only slightly bent (say less than a 1/4" runout)can be straightened cold by just using a flat surface and a heavy hammer and going at it gently. I wouldn't try it with one that has been bent more than that, because it may well be weakened by having been deformed so much.
Replacements are available, both new (reproduction or NOS) ones and used ones from a number of people who frequent this site. Just post what you need in the "Parts Wanted" forum and you'll be off and running. You can also get them from the Gary Wallace (mailto:chev4cyl@charter.net) or from Billy Possum (
www.billypossum.com) and from other vendors. The same is true of the felt wicks -- they are sold in sets of 12 by the Filling Station and others.
The best thing to do to prevent this is to avoid leaving the engine in one position for a long time, which allows the valve stems to corrode in place in the guides. If you start it up or at least crank it over every couple of months, this shouldn't happen. If you DO have to put it in long-term storage, and/or if a valve, lifter, or rocker arm does get stuck, "Marvel Mystery Oil" works well at both preventing the problem and freeing them up if it does happen. Just liberally cover valve stems, rocker arms and lifters with MMO and you should not have a problem.
Hope that helps.
All the Best, Chip
