'64 Dart Wheel Stud Specs

Okay, so i found a place that sells LHT studs, but i need to know the specs. I have a '64 Dart with a 225 Slant 6. non-power drum drum brakes.

I think they are 7/16 - 20L

Need to know Length, Knurl Dia, Shoulder Dia,

Thanks to all!
PJ

Here is the link for anyone interested!
http://automotivefasteners.thomasne...asteners-rods-and-studs/wheel-studs-and-bolts