Here is a little update, I have actually just about finished this project, just have a few bugs to work out.
This picture shows how far off the L&R lock bolt hole is off from the TC as well as how much I had to grind off the tang to get the lock in the mortise and have it go to full cock.
There are a lot of gaps between the "drop in lock" and the mortise.
Wood shavings to the rescue;
Pretty good fill in, the patch will disappear once the finish is on the wood.
I did a mock-up and most everything works, I had to remove a little more metal from the tang to get the lock to full cock. One more problem to solve; the lock will fire with the triggers set but not with the front trigger alone. Everything looks OK, nothing rubbing, I will solve this problem tomorrow.