Chrysler crank 8 bolt hole pattern?

I need to make a crank/converter adapter for my new crank and I was wondering if anyone had the dimensions of the hole pattern?

From what I see its a 100mm BC or 3.937, 3 15/16, same damn thing, but what I need is the offset of the odd hole. Does anyone know?

 

I do know that Coan makes nice bushed adapters for what your doing.

 

Yea I probably could buy something, but I'd like to make it myself so I know it will work right, and its cheaper that way.

 

If no one replies with the dimensions you could index a crank or flywheel in the mill.

 

Send me an email address , I have what you are looking for . Dave at dwq427@windstream.net

 

If this "adapter" bolts to the crankshaft and the converter bolts to the adapter I am pretty sure it needs to be SFI certified same as a flex-plate would.
I too like to build things myself when ever I can.
But in this case I also suggest you just buy one and be done with it.

Use the best quality bolts you can get to put it together.

 

What this deal actually is, is just a thru-bolt spacer with a register for a torque convertor snout, its a deal that Coan (and maybe others) makes for fuel type cranks that don't have the register that a stock Mopar crank has. Larry, I've got one that I'm not using right now, if you want I can send it to you so you can duplicate the measurements off of. PM me if you want it.

 

I have a machine shop..and the last one was from TCI..less than $20.00..cheaper then I can set up a cnc program for..Dave

 

Ronny expained it better than me, basically I'm making a register for my flexplate and converter, its not magic.

I have it under control, thanks for the imput.