Direct replacement for Fender bridges...

[Inconnu]

I own an older generation fretless MIM Fender Jazz bass made in the year 2000, with same size pickups. I was planning on replacing the bridge, but I wanna make it easy. I was think of getting a direct replacement, which will let me use the same screw holes then the original bridge, meaning less work and a fully reversible mod.

Question number 1 : Are these older MIM Fender equiped with standard bridges, which "direct replacement" bridges would work with (as opposed to the issue you get when replacing pickups on those basses) ?

Question number 2 : The obvious when changing the bridge of a fretted Fender is a Badass II... good idea on a fretless ? I don't see the Badass used on fretless basses often... any other bridge would be better. My goal : enhance the sustain and mwahh

[Emmaporkchop]

I just changed the bridges on both my MIM deluxe active jazz and MIM deluxe active P bass. I put a Badass II on the jazz, and a Gotoh on the P bass. I actually liked the stock bridge on the P, but I had the extra bridges laying around and figured I'd use them. The Badass is a direct replacement, but I didn't notice a big change in sustain. Soundwise it seems more focused and punchier. The gotoh on the P bass sounds warmer than the standard, but not a big difference. I had put the Badass on a fretless jazz I have but didn't like it for some reason. I would go with a Gotoh 201 if I were to change it out again though.
So question 1) Either of these bridges will work as a direct replacement.
Question 2) Like I mentioned, I just didn't like the feel of the Badass on the fretless. There's some other factors to consider though in terms of your goal such as strings, pickups ect.

[BassBerg]

I've done this mod to my MIM fretless and it is a drop in replacement. I had to shim the neck quite a bit to get the action low enough. It may have added sustain but as far as mwah...I didn't notice. High mass bridges is something I mod on most of my basses. Good Luck