Yup, The Nordstrand Jazz pickups fit perfect into the rout/body on the Jazz body. But the Nordstrand pickups don't come with any springs...T
Actually for traditional style J pickups and P pickups for that matter, you want to use foam, not springs, because the bobbins are not glued to the cover. They will fall out of the cover and sink into the body if springs are used and they are not glued/taped to the covers.
Thanks for the compliment, Killer woods indeed from Warmoth.
Love your Jazz too!