8V71 crank flange offset bolt hole

[bevans6]

The question is how much is it offset?  My tired old eyes get it at 183.5 degrees with it's opposite non-offset hole at zero, but I thought I would ask in case anyone actually knows.  The other holes are at 60, 90, 120, 240, 270 and 300, as you would expect.  I am measuring with a rotary table that has a vernier, on a Bridgeport, but I am measuring the edge of the holes in a scuff plate that's been used.  So I can measure to 1 minute to a crappy edge of a used hole... 

I expect I will put the hole close enough regardless, but I like to at least try to do things right.

Brian

[Utahclaimjumper]

 With your OLD EYES,, are you sure you are not measuring a dowl pin hole.??>>>Dan

[bevans6]

Nope, 8 bolt crank flange.  8V-71 apparently started out as 6 bolt with an offset dowel, but there was an update at some point.  Both of mine had 8 bolts when I got them.  I did some math, half a degree on a 3.750" circle is almost 16 thou, I should be able to see that with a loup.  I will try to see if I can fit the flex plate on the rotary table, it has brand new holes, never squeezed by a nasty old bolt!   

Brian