12" neck on a Jazzmaster build?

Creed_Clicks

I have a 12" strat neck lying around for sale, it hasn't shifted in a long while, so am thinking if it doesn't shift by winter, I might use if for a JM build. Thinking of a Blacktop pickup config, so humbucker in bridge and standard JM neck pickup. (I may put a H size WRHB in the bridge).
I have rarely if ever seen a JM with a 12" neck radius. There are hardtail Squiers and the Jim Root models, but with the traditional bridge, I don't think I have seen one. 
It should work though without any hitches?

Funkfingers

Staytrem replacement bridges are offered in 7¼" and 9½". 

I am not sure what options Mastery offers.

What would work for you is a Tune-o-Matic - possibly with roller saddles.

Creed_Clicks

Yep, staytrem would be out, a roller bridge which I have and forgot about might work. It’s a cheap bridge …

victorludorum

Or a TOM of course.