2000 c/k 3500 truck 454 rod knock

[Johnathan Johnson]

Hi guys, just had a quick question I've got a 2000 C/K 3500 truck crew cab long box with the 454 big block. A knock has developed in the motor and need to know what year engine will work. These motors go back to the 60s right? Will an older engine work in this truck? If so would I be able to swap over the current intake manifold coverting an older engine to efi? 

Let me know 

Thanks!