Engine swap or just sell truck?

Looking for opinions!

I have a 2006 KW T600 with a cummins ISX that will need a rebuild soon. I have recently put a new transmission and completely replaced all suspension parts on this truck. I also have a 2004 KW T600 with a strong C15 Cat engine but truck was totaled without doing any damage to the engine. I am leaning towards putting the Cat engine in my 2006 but I have had a few people say I should just sell it to buy another truck instead of possibly dealing with wiring issues of swapping from cummins to cat. I know what I have in my 2006 chassis and in my Cat engine so I think this would be my best option instead of rebuilding the Cummins or selling to buy another truck.

Anyone done an engine swap like this and ran into any major issues?

 

Looking for the most bang for my buck and might end up doing that. I prefer a Cat over a Cummins and only bought the 2006 with the cummins because I got it for a good price and now I know why. The Cat I have only has about 250,000 miles on it

 

I am not sure if it can be used or not until I visit with my mechanic