The Nissan Path

Hey Guys, I am from Chile, South America:

I need help, with my dad we buy a Nissan Pathfinder 1998 3.3

but we have a problem with "crankshaft" we just found a 3.0 "crankshaft" version and I need to know the parts are compatible?

Thanks for your cooperation

There may be a difference in the size of the crank nose and harmonic balancer. Easiest way to find out would be to get the part numbers for the two and see if they are the same. If the part numbers are different, they probably won't be compatible.