Installing smaller/larger pickup into a hollowbody?

[old long arms]

Hey all, I have a epi viola bass and recently changed the neck pickup out for a bartoloni ridenbacker neck pickup. The change was amazing, but now I want to swap out the bridge pickup as well. The problem is the that the bridge bart I was looking at is a larger size which would involve me doing some mod on the bass.

I also considered picking up a tele bass humbucker pickup for the bridge or a mustang bass pickup instead of the bridge bart. If I got the mustang pickups, I would have to create some sort of support system, which might be more trouble than mod-ing the bass for a larger pickup. Suggestions?

 

[SGD Lutherie]

The problem with those pickups are they are meant to be screwed into the body, not suspended on a pickup ring or pickguard.

You can get humbucker sized Barts that will suspend from a pickup ring. I had a Bartolini Hi-A 2B "mini beastie" in the bridge position of my '73 Ric. It's made to be mounted from a ring or pickguard, but Bill rigged it up to work on the Ric. it was a mini humbucker size, but any pull size humbucker shape would work.

Gibson used the regular size 1B Barts in the Les Paul basses.

 

[old long arms]

I found a seymour duncan single coil p-bass pickup that would fit the width dimensions at least, but I'm not sure how the two pickups would sound together?