Distributor question

I have 1 at the moment, am getting a 2nd tomorrow.
(Steel distributor gear) Long discontinued Napa part from a /6 racer buddy.
Any reason "not" to run it?
I have a NOS (not rebuilt!) Distributor in my engine right now. Has its original nylon gear on it. Only because it is NOS. And I've only got ~250 miles on that distributor since I got it.

My spare distributor has my steel gear on it, same distributor number as my NOS one, only with lighter springs in it that I put in, and a new vac advance pod. It's the 78ish one that all the non California super 6 engines got.
My buddy that I got the first one from, found a 2nd steel gear in his stash, that I want to put onto my NOS distributor when I pull the nos one to put my recurved one in to "experiment" with.
When I had my 79 truck I had trouble keeping nylon gears on its distributor.
Any reason not to run the steel distributor gear?
You have to be aware that there are stock gears & replacement gears, replacement gears have the roll-pin hole higher, & are intended to have a new hole drilled through the shaft above & 90° to the original one.
Examine & measure the gear carefully before doing/deciding anything, the replacement requires a specific procedure to index & position it.