[1clovey]

I was wondering if I could swap a 2006 engine with a 2003 on a 350 rancher es and everything bolt up the same

 

[Jbacon]

I'm pretty sure they would. I don't think there are any differences. But don't take my word for it.

 

[1clovey]

Thank you, if you can check from other members that would be great

 

[Saber6]

Check the bolt patterns and wiring harness if they match theres no reason you cant swap.