Loaded or light touring?
It would fit and have all the bits brazed on before the paint..

hub dynamo wiring guides

the tubeset wall thickness and diameters would be goldilocks..



i'd try a horizontal oval top tube, to stiffen it laterally for handling the rack
mass of load in back
beefy kickstand mounting
slack like 68 degree seat tube, setback.. to unweight my hands.

26" wheels.. Rohloff hub .. Eccentric bb , disc brakes .

I got help with a build 10 years ago cargo bike maker's materials.
so frame weight crept up a bit.

2 3/4 .049"wall tubes bent at rear axle and seat tube,
so formed the rear triangle and the parallel side by side top-tubes..

no tail wagging the dog feeling, [bruce gordon's racks , solidly mounted]
It's a700c wheel bike 622-40 tires 48/40 spoke wheels, derailleurs..

18 'speed' drivetrain..