413

The 62/63 Max Wedges had valve reliefs to unshrould
the large 208/188 Valves on one side. the 64 Max Wedges
had reliefs on both sides of the top of the bore.
You could use a Head Gasket as a template and a grinder
to put them in yourself and you would gain a bit of Air flow
if your bores are less than 4.32 and you are turning 6000 plus.