I don't see the harm in one. It'd fix a few issues that I have currently. My return boss is broken off, it's rusty inside & out, unbaffled, won't have to go with a surge tank, leaks gas fumes into the cabin, I can center it better than stock and have better weight distribution, I can easily go with AN fittings, all while being more robust.
On another topic bought a new oem (non N1) water pump. The one I have wobbles and in my haste to see if my RB25 even worked in the 280z I never did get around to replacing it.