C-12 swap for DD 60 Series

Hey guys and gals. I have a 2000 FLD 120 and I'd like to swap out my Cat C12 for a Detroit 60 Series. The C12 is 355/410 with a Merritor 10spd manual. Is there going to be any compatibility issues that I may face by swapping out the engines, and what might they be, if any? Thanks in advance!

 

TBH I'm not entirely sure. I've heard some people say I'll have to go to a different torque rated 10 speed. Personally, I'd like to stay with the C12 that's in it but Cat is so proud of their rebuild kits, Jeez! The prices!

 

Thanks for the info! A friend of mine actually told me about a program Cat has where they will do a complete overhaul with a comprehensive warranty. I think somewhere around $20K is what he said.

 

Yeah, it's a pretty simple engine to work on. But I am hoping they can upgrade/modernize the heat function. Currently, to turn the heat on or off, you have to raise the hood, go to passenger side of the engine and manually turn two valves. The problem is, you can't stop the heat. I turned it on because I was in a colder area and had to roll down the windows because I was pouring sweat! Roasting!