[PAR35]

If Boeing had modernized the 727 by replacing the 3-man cockpit with the 757 2-man cockpit and changing it to a twin engine configuration

You would pretty much have an MD-88, but with 3 across rather than 2 across seating.

Maximum seating -
MD-88 - 172, typical 142
727-200 (streatched version) - 189, typical 145.

So in a standard layout, there is a 3 seat differential.

[Paleo Conservative]

You would pretty much have an MD-88, but with 3 across rather than 2 across seating.

But it would have standardized the 757/767 cockpit on smaller aircraft. One of Airbus' selling points in the comonality of cockpit layouts across their whole line of aircraft.