i don't think it would be easy to pull off a s14 to s13 180sx tail light conversion, if thats what you're asking. i'm sure it could be done but it wouldn't look good. besides, the rps13 180sx tails belong on a 180sx in my opinion.
you'd basically be trying to fit these:
onto this:
when they actually belong on this:
and should look like this:
you choose if you want to do this. it would be quite an expensive modification if you aren't doing all the work yourself. and if you are doing the work yourself, good luck.
i wouldn't advise trying this but its your car and your money
add: now that i look at the pictures, the shape of the 180 tails alone won't work with the s14 rear end. you'd have to do something absolutely insane to fit them on.