The type involved was also known as a CV-300, a CV-240 with R2800CV-16 engines.
The 240 was a totally different airframe than the 340/440. Shorter wingspan and fuselage. The airstair was on the right versus the left on the 340/440. And there was some difference in the hydraulic system I can't remember right now. The 340 and 440 are the same size, the engine cowling on the 440 is tighter with augmenter boxes replacing the sugar scoop exhausts on the 240 and 340. The 440 has a 1000 pound higher TO weight than the 340. The is some difference between the CA series engines and CB series (not CV). Old company I worked for bought a derelict mainly to get the CB cowls.
As I recall they ran out of gas. Had heard the crew had recently transitioned from a DC-3 to the CV. CV burned right at twice the fuel the Three did so the initial fuel load looked familiar.