89 wrangler OM617 swap, radiator question.
 

So I've put a lot of time and effort into my MB swap, and have tried to keep it looking as if it's factory. Along the way I've also done quite a few other things to the jeep ( if anyone is interested I can post more pics, but for now I'll stick to the issue at hand). Anyway, I'm running the stock 4.2 radiator with a shrouded ford Taurus fan with the MB and now that the weather is turning the temps climb when pulling hills, so I flushed the cooling system and put in the proper coolant, checked the thermostat, water is circulating and the pump isnt that old. The jeep rad is almost the same exact size, but is a single core. So my question is, are the MB radiators a dual core? If so I think this may be my issue and I may spring for a perfomance 4 core or something like that and will hopefully cure it, I really want to drive this thing! Thanks in advance for any info, heres a couple pics of the engine bay, and a couple of the jeep just for your viewing pleasure. I have plans for a much better air cleaner by the way.
http://i1192.photobucket.com/albums/...ps278ab02a.jpg
http://i1192.photobucket.com/albums/...psf412873e.jpg
http://i1192.photobucket.com/albums/...psf7ae5990.jpg
http://i1192.photobucket.com/albums/...pseae3da0b.jpg