Some technical info is needed by Forum members who might be interested in what you are offering...
1) What are the casting letters or numbers on one side of the ribs on each rocherarm? ECG 6564 or 5751066? Are they ALL the same I.D.?
2) Are the casting letters found adjacent to the cylinder head to intake manifold flanges large letters or small casting letters ECZ-G
3) IF your heads have the large casting letter ECZ-Gs, are they the early '57 un-posted units or the later '57 FoMoCo and '58 Merc 'posted' heads?
IF you need help in determining if your heads are 'posted' or not, see the following web page
http://yblockguy.com/techtips/postedheads.htmlHope this helps. Thanks for listing your parts here, Robert.
NoShortcuts
a.k.a. Charlie Brown
near Syracuse, New York