Sorry feel like there is a dedicated A/C thread but couldn't find it
Unless I'm looking in the wrong place kinda devastated that there isn't a conversion for the CV-240/340/440 fleet to cargo, with some charter companies still using them even recently would certainly add some longevity to a fleet in GW#4.
Spec details on the CV-580 (Converted from CV340 or 440) freight conversion:
https://aviationcargo.dhl.com/aviationcargo/sites/default/files/aircraft_dimension_sheets/convair.pdf (https://aviationcargo.dhl.com/aviationcargo/sites/default/files/aircraft_dimension_sheets/convair.pdf)
http://www.thecharterstore.com/wp-content/uploads/2014/04/convair-cv-580.pdf (http://www.thecharterstore.com/wp-content/uploads/2014/04/convair-cv-580.pdf)