What caliber are you going to use, and what was it from the factory?
Are you going to use the same carbine length barrel or longer?
If you will, do post pictures, before and after.
Gonna be a .257 Roberts. Original doner gun was a .22 Hornet. For some ungodly reason the original number 3 stock was cracked once on the forearm and on both sides of the buttstock so it most likely be used as a pattern stock. Current thought is 23" barrel instead of the 22". Machined quarter-rib that extends back over over the receiver machined for Talley sights, also to include two folding (Safari-type) sights.
Straight stock with pancake and Biesen steel buttplate.
Gonna mount a little Leupold VX-III 2.5 x 8. Wanna keep this pretty lean and mean.
PS. Well, above is at least the current plan.