Making a c30 long bed fleetside

[70ptta]

Hey guys. I need some help? Heres my goal. I want to make a 72 long bed dually hauler. I dont want to use the later year rear ends because I dont want to use the side tubs. I have access to a 67 C30 and a 72 long bed fleetside C10. What will be the easiest way to do this using these two trucks? From what Ive read I can use a long horn bed and that would bolt right up to the C30 chassis but I want to use a regular long bed. Please help point me in the right direction. Thanks