It was a very tight squeeze, but it was possible. The box was around 5.7cf @ 33hz. I think it was something like 1.8 cf per sub, pioneer reccomended 1.75 ported.
Box measurements are
Port is 6x12 firing forward, ended up sounding real nice and for being such a tight squeeze it does let alot of the bass into the cabin. Right now the setup is running on a loaner ED 9.1 @ .5 ohms, but will soon be wired up to an AP15001D @ .5 Ohms. The big 3 (actually 4) is done in 1/0, and will add a second battery soon. The subs are gonna be upgraded to 3 AP TXX-BF 12"s Running on 2 AP1500s strapped @ 2.5 ohms. The subs right now are Pioneer Champion 12"s rated @ 400rms
Will get videos when the first 1500 goes in, then in a few weeks when the 2nd one goes in with new subs.