Dad has the factory 7-pin...but he says he counts "about 8 passes" thru the cooler. Would be difficult to check the radiator size, without another to compare. Either way, he doesn't want to go beyond 6000 lbs anyway with the trailer, but we'd still like to know.
We'll try looking up the VIN in the couple of links posted here.
thebrakeman ('70), DW ('71), DD ('99), DD ('01), DD ('05)
2004 Surveyor SV261T (UltraLite Bunkhouse Hybrid)
2006 Mercury Mountaineer V8 AWD Premier
Equal-i-zer WDH (10k), Prodigy Brake Controller