I have a set of "G" heads I would like to rebuild and install on my 56 T-bird 312. I've heard that using 1.94 int and 1.60 exh valves is a good upgrade for these heads but I cannot find part #'s or a source for the correct valves, are these by chance common SBC items?

A good source for these parts would be John Mummert. You can visit his website at http://www.ford-y-block.com/. Hope this helps.
Rono

  Ron Lane,  Meridian, ID

try classic engine supply 515 961 7292. i have used 2sets of there int valves.110 for16new valve springs and 8 1.9 intakes. checked the valves on my grinder they where perfect,also included was set of hardened keepers