O.d.

If he was worried about gear splits, he wouldn't be considering an OD box in the first place.

He wants to cruise down the road. That box will do it. He wants to beat on it a bit, not set a nation record, or drop the laundry on Daddy Dave or Chief.

You should be good to go. Just use the BEST gear oil you can find, preferably in 74w140

Rose
I mean no disrespect, when I say
I guess we live in different worlds, cuz in mine, we don't build strokers or BBs to cruise around with, or tour.
But you are absolutely right; if that is his intent, "that box will do it".
And I also think that for cruising and touring with a stroker or BB, a 3.23/3.55 rear will do it, and then there would be no need for an O/D in the first place

Op
if that IS your intent, to cruise or tour,you better disconnect the secondaries, in case you forget. I have three O/D trannys here that say a hot 360 is too much for them.When the teeth peel off, there's a good chance that the pieces will take out the cluster as well, and possibly more. I always kept a spare tranny on hand, so as not to risk walking the summer away.I have one left. But I'm no longer running those.