I know what guitar scale is 😁
What I don't know if Fender neck (more precisely 50th anniv. JS neck) fits Warmoth JS body.
I think that neck pockets might be different (I will end up with huge gaps, maybe will not intonate properly at all), because ALL warmoth bodies have either strat or tele pockets, and Fender shortscale necks are smaller in every aspect compared to strat or tele.
I don't know if the 4 mounting bolt holes even line up.