PAL to NTSC : any preset better ?

Hi. I want to submit to a Canada documentary festival my 52 min. PAL 25fps progressive  Full HD film. The festival requests a NTSC .mov codex Apple ProRes 422. They don't specify the frame rate. What would be the best Adobe Premiere Pro preset for transcoding ? Is the MXF OP1a format with the codec : XDCAMHD 50 NTSC (4:2:2) apropriate ? Should I switch to 29.97 fps ? And there is too the preset XDCAM EX 35 NTSC 1080 (4/2/0) ?... And what about the size ? Is there any proportion difference with the original PAL 1920x1080 ? Thanks for any help.