Rear end swap question

[hosspala]

I know before you say it,"theres a search function"
I've done that here and everywhere and maybe I'm missing it, who knows so I'm asking directly

I've got 52 3100 and I'm going to be installing a 4 link with bags. most likely the TCI kit unless y'all say otherwise.
I want a rear end as narrow as possible to get the widest tire possible without moving the stock frame rails, I have access to a 2WD S10 rear and from what i can measure it seems too close to call without having things apart.
I understand i will have to cut for wheel tubs as deep as the stock frame rails and I am prepared to do that.

Does anyone know from experience if a 2WD S10 rear end will work with stock frame rails?
OR
know the absolute smallest measurement i can go? so ill know what to look for