That's a DVC driver, if my Google skills are to be trusted. It should present a drivable load for a 4 ohm stable amp with the coils jumpered in series.
Here you go pantera.
Maple-veneered 2 cu. ft cabinet on clearance. All the cabinet needs are holes and an amp. It even comes with feet and a magnetic grill, although you might need to shim the front baffle screws out a bit with washers before the grill will stay attached over that driver's bulky surround. Anyway, your driver in this box should have a Q around 0.5 and a reasonably shallow rolloff that should be pretty easy to overcome with room gain and either a miniDSP, a Behringer DCX2496, or some other sort of bass management. If you've got 1550 watts to push through it, you ought to be able to EQ it pretty much any way you want and still have plenty of overhead for good SPL.
If you wanted to do vented as in Granteed's original suggestion, you could always just make the cabinet taller to keep the footprint as small as you need. It doesn't have to be a cube. Using 3/4" MDF, a box having external dimensions 18.5"w X 31.5"h X 18.5"d with the slot vent turned in a zig-zag for three lengths would just about do it, if my math is correct. (The port length would be 45" instead of Granteed's recommended 49.5, but the tuning would only be raised by 0.8Hz -- not enough to notice, I don't think.)
But if I were doing vented, I think two 2" tube ports, each 9" long, in an 18"x25.75"x18" box, would be easier. That should give roughly the same tuning, and WinISD claims it should result in a vent mach of 0.01.
Either way, congrats on scoring a really nice driver for free!