Wow! That's the exact model that we had for our first dishwasher when I was growing up. We got it sometime around 1980 (+/-) and it lasted through the early 2000's. It was also the portable/convertible, and my folks built it in after they moved to the 'new' house in the early 90's. Ours was always very heavy to roll across the kitchen to hook up to the sink...but then I remembered that we had a ginormous Litton microwave that lived on top of it because it was too big to fit under our upper cupboards and couldn't live on the counter.
The rack designs were wonderful, despite the 'tunnel' for the center tower. We NEVER had a complaint about double-stacking smaller items on the flip-down racks flanking the tunnel (unlike the similar racks on my 2009 KA!). Everything always came clean. And the keeper rail that ran along the inside of the outer sides of the lower rack were brilliant for plasticware lids! Why don't we have those today???
My only complaint was the noise (which I recognize many here regard as an asset, not a liability). I had to crank up the TV, which led to getting yelled at, of course. Oh, that old Quasar-Motorola! And it's sworn enemies, the dishwasher, the Mixmaster, and the vacuum! But I think that's another thread.