Seems I remember a LR-24D climbing well at a 12K takeoff weight. (6K of thrust)
Then they added a lengthened fuselage. 3K of weight and called it a LR-25. Same thrust of course. We called the 25's pigs. Other outfits with 35's called them rockets.
Then they added 3K of GW to the 25's, added 1500lbs of pig fan thrust that died above 30K and called it a LR-35. Guys in outfits with 55's called it a rocket.
Small cockpit for big guys in the 20 Series. Always knew I could unpack myself one way or another after 2.8 on the Hobbs.