This project will be taking some time as I am feeling the draw to warmer climes. The start, showing just the tang end.
The original holes (actually a different stock, but you get the idea).
With the pilot inserted
Through the stock
The opened holes
An action with bolts an an uncut pillar
EDIT ADD: After the trigger is removed ...Next step is to cut the pillars to proper length and make certain the barrelled action sits properly with a bit of room for bedding compound under the action, and the barrel centered with proper free float.
Then goo up the pillars and holes ... Set the barrelled action in place and make sure the extended bolts fit properly through the holes in the bottom metal. Note, the bolts are coverd with a single wrap of black tape to make sure the bolts do not contact the inside of the pillars.