Originally Posted by tclederman
U|C (TDC) and 5 degrees off of it (235 flywheel, year unknown)

UC or U|C would perhaps be more meaningful than U/C?

UDC (U.D.C.) is used in almost all Shop Manuals for TDC valve timing.
Tim, what character did you use for the vertical mark? I use the slash mark because I don't see a solid vertical mark on my keyboard.

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