Does it have the 3(front, middle, rear) reinforcement cross rib's?
If not, send it back, and get one that does.

Found the best way to intall'm is by lightly gluing a factory style gasket to the pan itself.
Then a light coating of rtv(gskt to blk).
In you decide to use the one you have, probly have to tweek it some, and use rtv to fill the gaps.

Dont forget to use some rtv around the 2 mntg bolts.