I believe its 5 degrees + or - from TDC...I'm dealing with mine now!
8 degrees BTDC.
Your timing is off.
hey i have a 73 ranchero 400ci and just set the timing at 6 degrees advance.
8 degrees before TDC
73 degrees Celsius = 163.4 degrees Fahrenheit.
73 degrees Fahrenheit = 22.7 degrees Celsius.
90-73 = 17 degrees
73 degrees Fahrenheit = 22.7 degrees Celsius.
www.motorcraft.com shows Point Dwell as 24 - 30 / Point Gap .017 / Ignition timing see Emission Decal on a 1973 Ford truck
107 degrees
No city is large enough to be located at both 73 degrees west AND 4 degrees west.
cos(73°) = sin(17°) = ~0.29237