Will a OM603 motor fit in my 1984 Mercedes 300D?
 

So I recently just threw a rod in my diesel Merc and am looking to doing an engine swap but I was gonna see if maybe I could swap a OM603 motor in instead to get a little more power out of it. But it seems that the OM603 is a 6 cal instead of a 5, so I'm curious if it would fit. Any suggestions? Or do you guys think I can just get as much power out of the 5 cyl?
I'm looking to restore my whole Mercedes in due time and I would like to make it a sleeper, in other words, fast haha. I'm thinking of trying to make the turbo inter cooled, but I notice on mine the intake is on the same side of the exhaust. I'm not really sure how that set up works so please, any suggestions/comments or info would be great.