I'd cut it into two pieces. You'd hate to have to wrestle that monster into position every time you need to access the engine or tranny. Also, it won't be as strong as a flat plate. You will want to weld some sides or angle iron into the top of it for strength.
_________________
2003 Liberty Sport 4X4
DIY Frankie Lift, BBS Rims, Aussie Locker Rear, DTT Front, Renegade Rack & Light Bar, Custom Front Bumper w/ Warn XD9000i, Custom Rear Bumper, JBA UCA's, Full Skids(Mopar, Kilby and Super skid), CRS Rock Rails, CB, EVIC, Nav, power dim mirror, (2) 8" subs under front seats.
http://www.cardomain.com/ride/2512777