I installed the Phantom 340 kit in my Super Bee's tank this past spring.

The kit is high-quality and well thought out, but if you do it like they say (just drill a big hole in the tank), the kit will obviously just hit the trunk floor at the highest spot. I ended up spacing my tank down from the trunk using some thick rubber mat, but I'm not completely happy with it like that. The ideal way to do it would be to cut and weld a section of the tank to be lower and then install the kit into that section, but that was more effort than I wanted to do.

If I had to do it again (and if it had been available at the time), the Tanks-inc factory style tank is absolutely the way I would do it.