The general idea is something like the above.
I gave the cabinet maker the screenshot above as a general idea. It's basically a dresser. However, we will have a plywood side and maybe slab drawer fronts.
Here is a rough sketch. Cabinet run (at top of sketch) is 194".
Here's my logic for the sink orientation. The prep sink need not be large, but I don't want one of those tiny prep saucer-sinks that are only big enough to wash your hands. The wash sink needs to be a single bowl, large enough to soak half sheet pans (13" x 18"), big stockpots, etc. So a medium sink and a large sink. I don't want the sinks to take up more countertop width than necessary (small kitchen). I don't want a stub of countertop between the sink and the wall (unevenness with adjoining counter, water splashes into gap). So the solution is turn the sinks 90 degrees, have them use the entire depth of the countertop, and wall mount the faucets (they will be commercial kitchen faucets, with a pre-rinse on the wash sink). Might be a problem for a 5' 2" woman to reach the back of the sinks, but the 37-38" counter height is going to rule her out anyway.
As for old/historic, the value of this house is in its age and period appearance. People buy houses in my neighborhood for the historic aspect. They (and I) want the mod cons, in a historic look. Granted, the commercial appliances/monster hood are going to narrow the appeal, but hopefully the next owner will be seriously into cooking.