I have recently got into speed running and decided to choose Super Mario bros 3. However, I've noticed that some of my jumps were too short compared to Kirua's video when I was at Max P-Speed. Because of this, I think I have the PAL version of the game installed. Does anyone have a good link to the NTSC version?

By law, I cannot link you directly, but searching for Super Mario Bros. 3 (USA) should get you there.

Asking for roms on the forums is a big no-no.