I've also got a doubleneck I put Retrovibe Ric-style pickups on.
Again, it's a 22-fretter, though, but the pickup is right at the neck.
I was really lucky with that one - it had "EMG" (yeah, right!) pickups and the Ric ones fitted straight in, even the same screw holes.
Again I need to have a proper listen, but the bass does clatter like a Ric should.