13 Bravo: No, those two rifles you mentioned are entirely different animals and parts do not interchange.
The P14 and P17 rifles made by Winchester and Remington are similar, with the P14 designed for the rimmed British 303 cartridge and the P17 designed for the 30-06 cartridge.
The SMLE (Short Magazine Lee Enfields - hence the confusion with the 'Enfield' terminology) were designed only for the 303 British round and the actions are not as strong as the P14/17 actions. They are entirely different actions.
The scope mounts for the SMLE #4 Mk1, No1 Mk3, or the MkV are not the same as those for the P14/17. You may need a gunsmith to grind off the rear sight ears ans tap and drill the action for scope bases, unless you can find a no-gunsmithing mount for the P14.
On a personal note I would think the Unertl 12x would 'overscope' the rifle and caliber and I would go for a lower powered scope. Just my 2 cents worth though. HTH. Mikey.