On Thu, 1 Dec 2016 05:54:56 -0800 (PST), TimR
wrote:

My shower needs replacement. The drip can't be stopped, new washers and seat do nothing, and the stem slips. I've tried the specialty places and they don't even recognize the brand, it seems to be the original 1962 installation. My plan was a new stem and seat but we couldn't find one that would fit.

So probably time to just replace. But that's a job I haven't done.

It is a two handle shower, which I like. I see you can still get those, I thought it was going to have to be a one handle conversion. Is there anything wrong with going back with a two handle? One that will last and be easy to replace parts on, I really would like this to be the last time I do the job.

I am going to have to cut the wall on the other side to get access, and that won't be easy - it's plaster and metal lath, not drywall.

But not having seen the inside of one of these, I'm wondering how hard it will be to get everything connected back up. I'm guessing it is galvanized pipe but I won't know until I get it open.

Or am I going the wrong direction?

That depends on if going in from the shower wall is an option. Since
you probably want to replace the drains too, opening the other side is
the best option.
The piping should be the same everywhere, unless it's been repiped.
Just measure the new piping carefully and you shouldn't have a
problem. Or get plumber bids after opening the wall. Make sure you
frame an access hatch when closing the wall.