older truck vs newer truck

[Nilao]

Forgive me if I'm wrong here but I thought the pre emissions CAT was a 6nz single turbo. That being said I think I'd go with a cummins. They have better tune ability IMO. plus it seems there has been a lack of quality parts from CAT since they left the on highway market. But some people just have CAT in their blood. I used to be one but this cummins has made a believer out of me now that it's been properly repaired.