Dash 80 132 inch fuselage, KC-135 144 inch, 707 148 inch. Is the reason such different planes can't be put into production in such short time today due to tooling cost, regulations, or something else? My family has an engineering history. I asked a cousin of my father's why he guided his son on a business career instead of engineering. He said no loyalty in the engineering business. Started with Boeing after graduating in the late 40's, worked on those jets and more until '71 and the end of the 2707, then axed. Retired as a contract engineer for Northrup working on the B-2 and returned to the Puget Sound area but remained bitter about Boeing.