Does anyone know the size of the bolt that goes into the end of the crank. My car has a helio coil in the crank and its starting to strip out, so I need to go buy a tap before I put my car back together this week

Here are some pictures from Shoebox's website showing where it goes

 

Pretty sure it's 7/16 X 20.

Edit:
Verified. Bolt is 2.25 inches long.

 

yeah, thats the size

 

Thanks guys for the fast replys, I will go hunting tomorrow for a tap