[Nalfein]

Will an RB26 head fit on an RB25?

I'm asking cause I wanna do an RB25 swap into an s13 but I've heard the 26 head revs better...

What about internals...? I know the 26 internals ie: crank, rods, pistons are stronger will they fit in the 25 (and how will the change specs like compression and displacement) or would it be cheaper and/or better to find some after market rods pistons for the 25. I plan on making 500 hp.
Where could i get a hold of some after market internals for the 25?

By the way my names Matt, I'm 20 and new to this forum... just trying to tap into this deep well of Nissan knowledge before i go and spend a shitload of money.

Thanks in advance