So why did Boeing not develop a twin engined 2 man cockpit version of the 727? I've always liked the 727 better than the 737. It seems that Boeing converted the 737 300-500 into the replacements for the 727. With the much bigger and heavier wing of the next generation 737, there really isn't a suitable Boeing replacement for the 737-500.
Probably too much work, you'd have to rewire the whole damn cockpit, replace everything.
Boeing did come out with a few 767's with a 3 manned cockpit. I think they went to Air New Zealand, they were modded I believe.