Bill, which Nissan t/case was iron ?
Is it as far back as the old G60 or newer such as the MQ ?
SWMBO had an MQ shorty when we first met but I can't recall what the t/case was like, just that the g/box was a sweet shifter behind the 2.8 six and it rode like a tip dray, even with only half a leaf pack front and rear. :(
The only experience I've had with successful cast iron welding was when dear old Dad welded a Terry refrigeration compressor flywheel up when the compressor hydrauliced on liquid refrigerant.
Usually they smashed valves and bent rods, in this scenario it just smashed the nose clean off the flywheel.
Lots of pre and post heat in our big oven we had in the workshop and it lasted for about another six years until I changed it for a new one.
It was an all nighter at the time, it had close to $25,000 of Italian salami in the room to save. (it was on their curing room)
IIRC it had something like a 10-12HP electric motor driving it, probably nothing like the thrust loads your t/case conversion would experience.
