I'd be 99% sure the the length of neck and depth of pocket are correct therefore the scale length will also be correct.
To cut the pickup surround IMHO would look very bad when job finished.
To slot the pickup cavity slightly as shown in my previous reply isn't a huge issue, I took my time and cut away at it with a Dremel. If you don't have one they are cheap and always come in handy for lots of unrelated jobs about the place.