You don't want to drill that hole all the way through because you want the smaller lower portion of the hole as a guide for the Tee handle. Also too large a hole will allow the epoxy to run out before it sets.
Insert the Tee handles through their respective openings and slowly tighten up the forward Tee handle.
Inletting pins are a must for me as well as Tee handles, available from Brownells or other gun tool supplier.
Insert the Tee handles in the forward and rear tangs and fit them into the screw holes in the machined stock to correctly align the parts.
Once the barreled receiver is approximately half inletted into place I use the Tee handles to more perfectly align and slowly draw the bottom metal and top metal together.
FDB's Rocfast service covers all products encompassed in their profile - this includes: budget locks, camlocks, compression locks, knob locks, rod locks, spanner locks, waterproof locks, toggle latches, concealed hinges, flush hinges, butt hinges, lift-off hinges, 'piano' hinges, stainless hinges, weld-on hinges, earth bars/busbars, flush handles, grab handles, lever handles, tee handles
, paddle handles, padlocks, support stays and seals/gaskets.