I am designing an adapter plate for the OM617 to the late model GM 4L60E transmission. Is this ok to post in here? If not please feel free to delete it.

The objective:
Retain stock flywheel for external balance.
Retain Stock 4WD in S10 chassis.

First, The torque converter pads for a V6 4l60e are on a 10-3/4" bolt circle.
Retaining the stock flywheel required a 10-1/4" bolt circle.
which puts the holes 3/8" off the outside edge of the flywheel, and 7-7/8" (if I remember right) center to center for the bolt circles.


I cut the pads off the TC and re-welded on 10-1/4" circle. Basically bolted the pads to the flywheel and centered the TC on the pads, tacked and re-welded.
This is just for mockup, I will have a TC made with the pilot bushing for centering and balanced.


Adapter plate designed in SolidWorks. Initial prototype to be laser cut this week. Revisions to follow