DW should be placed next to your sink don't you think? Those come in 18 or 24-inch versions. You'll have to extend the counter in front of the window.

As for the combo unit. Plenty of people would kill to refurbish that for a tiny home or studio apartment. I have never seen one that has a DW. IMO there is a market for it and because it's from the 60's I'll bet there are still parts if you want it repaired. The trick is to find the right guy to do it.

In its place, you can simply install a 30" range & low profile microwave as you see below..

These units will make a lot of sense for small kitchens. Too bad they are no longer being made.

I had no idea such combos existed! Personally, I would replace the entire unit with an induction range (with ventilation above, +/- microwave), and put a dishwasher to the left of the sink. You could either extend the counter and get a built-in dishwasher, or just place a portable dishwasher there that you hook up to the sink.........a built in looks nicer, is quieter, and offers more options, but it depends on your budget for building and plumbing.

Unfortunately, there's a heating duct in the floor under that window, so moving the DW next to the sink is not really an option. :(

Create a cabinet open at the bottom and use a single dish drawer. It’s very doable. It’s doable even with a standard ADA DW. That’s why toekick grates are used.

Wow! Let's combine the worst of all worlds into one unit! :-)

Replace the range. And yes, the DW should go next to the sink. but doing so will likely require that you replace the counter top, too, and add a cabinetry end panel on the exposed side.

Here's a better shot of the space to the left of the sink (with HVAC duct)

I wonder if it would make more sense to leave the DW where it is and put a new range along the back wall between the windows.

@Christopher Schoen, sadly I think this is a full remodel. There is nothing about this space as it currently exists that will make this a functional, modern kitchen. The whole thing needs to be re-thought and you might have to move the HVAC to make it work.

How about this?

1. Remove and discard the old combo range/dishwasher.
2. Remove the sink and replace it with a drainboard sink (examples: Alfi Trade, Allardt)
3. Beneath the drainboard, install an 18" dishwasher (example: Whirlpool WDF518SAHM)
4. If necessary, move the upper right-hand cabinet, leaving a 30" opening to its left.
5. Add a new 30" cabinet above the range to support an over-the-range microwave oven.
6. Add a new cabinet to the right of the 30" range opening.
7. Install a 30" over-the-range microwave oven.
8. Install a 30" range.

"Here's a better shot of the space to the left of the sink (with HVAC duct)"

I wonder whether you could extend the cabinetry under the window, add some duct work inside the cabinet to bring the HVAC duct to the bottom-front of the cabinet and install a toe kick register beneath the cabinet doors or drawers.

I like that idea, at least in the short term.

It looks like the window sill is flush with the *bottom* of the countertop, and it's hard to tell from the picture how much bottom clearance there is on the existing DW, but once I get into the space on Monday I can see what Mr. Tape Measure says.