Hi Jim -
I'm glad to see that you got the machines that you wrote me about in November.
When you wrote, you said the baseplate was rusty, but upon further examination it sounds like the centerpost is nicely shiny except where the tub gasket mounts...is that right?
Rust typically starts on these centerposts at the mounting line where the tub gasket meets the centerpost. It then progresses upwards from there as seals wear. There are several members here who have painted very rusty, even fully surface rusted centerposts, with epoxy paint (POR-15 for example) with good success.
If you have a shiny centerpost, I would fix-up the gasket mounting area and replace the centerpost seals to keep moisture to a minimum in this area, and consider yourself fortunate that you have a nice part already. As I mentioned in my message to you earlier, the last baseplates available from Whirlpool were for the 1981-newer models which incorporated a revised baseplate profile and the 1978 centerpost. I believe I paid over $80-$100 wholesale for one in 1992. If it were still available today it would cost double or triple that as prices rise dramatically as they age on low volume parts.
The baseplate for your machine was used from late 1973 through December 1977, so only four years. The chances of finding a NOS baseplate are probably nearly nil. As to a donor machine, they are out there, but to find a better baseplate than you have, you'll need an unused machine or one even more lightly used than the one you have already. Baseplates from 24-inch machines, from standard capacity machines, or later than 1977 large capacity machines will not work in your machine for various reasons. The closest fit would be a 1978-1981 large capacity baseplate, however you would need to replace your basket drive and the wash basket.
If I understand the description of your machine's condition correctly, replacing this baseplate sounds unnecessary to me.
Gordon[this post was last edited: 1/2/2014-15:12]