I had a under car serge but I also have a custom made drop tank with exhaust out both side so I had room where anyone with a factory tank doesn't
I'm changing my under car serge due to some difficulties iv had with fuelab prodigy series fuel pump and iv changed to that after my twin 044 turned out to be Chinese crap and started making stupid noises and now have got a AI in boot serge with submerged twin walbro 460 pumps about to turn up next week
Here is a pic of when I first fitted my under car serge
This worked great till pumps started making stupid sounds
And this is a few months back with the fuelab pump that has givin me the sh!ts big time so decided not to use it any more
This always has a cover over it iv made but these pics where all taking during installation times, that's why some of the hoses and stuff arnt finished in pics
I'm not sure how much room is above diff for a under car serge, I think that would be the only spot that would work
If you call Julian from AI he will be able to tell you how big the under set up is