is there a way to mod the ntsc CARTRIDGE for playing on every pal snes console? if needed i could use parts from another pal cartidge...
Why would you want to do that ? The game would play poorly. Even worse if it's an "speed optimized" game like for example Mario Kart (the PAL version is optimized to perform just as good as a NTSC game on it's original PAL system.)
Yes, it is possible. Either disable the cic chip in your SNES or in the cartridge, then put the cartridge in a PAL game shell, or just remove the shell entirely, and it will play.
Most PAL games are not speed optimized (only a handful were), but just identical NTSC carts with a PAL cic chip inside. Your modded game will play identically to these.