No 4 (T) tech data.

[Surpmil]

Could the issue of getting proper alignment between the scope mount fittings and the bore be helped; by using a laser bore sighter in the chamber and a laser pointer rigged into the scope mount.
That would allow you to sight the laser's on your workshop wall initially to get close. Then at a longer distance before final soldering of the pads.

That is exactly what I did for the IWS brackets I had made.

Information

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[XL39E1]

Attachment 114459

The Mount and pads drawing does provide the location dimensions of the pad centre line.
Front face of action to centre of front pad is 1.5inches, then front pad to rear pad centre line is then 3.6inches.

These identical dimensions appear on 4 different and revised mount drawings, from 1940 to 1970.