Check ya owners manual . . . they usually give the specs for any globes in there . . .
Otherwise, drop into your local ford dealer, they'd be able to sell you one easy, you might save $1 or so going to kmart, but if your not sure, save the hassle, and make a note for next time
Generally with the smaller globes, the only thing you need to watch out for is whether their pins are directly opposite, or offset slightly, but if your goes in both ways, your either xtra strong, or they're opposite :)