Master Cyl

[TerryD]

From JM’s 67/68 Z28 book confirming 5460346 WT master with bleeders.

Other things I’ve noted regarding the 346 master are that there are 2 front styles for the WT stamp and that some masters have an upside down cast number.
I believe that both versions of the WT stamp are legitimate although beware that reproductions (or restamps) do exist as stated in Chick’s build thread.
I also believe that both versions of the casting number are legitimate. I do wonder if Defiance had more than 1 foundry and if that’s the reason for the different casting number orientation and stamp font?

If you’re also looking for a lid you’ll need one without a SAE stamp. There are reproduction lids out there but it’s easy to spot them since font and word spacing is different.