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Posted by Bob in Illinois [76.16.9.188] on Monday, October 19, 2009 at 20:38:39 :
In Reply to: 4bt in WM300 posted by Winslow Bent [69.144.101.124] on Monday, October 19, 2009 at 02:15:48 :
I installed a 6BT in WWII WC-63. I used all civilian power wagon sheet metal. It was no easy job. I am running a modified NP-200 transfer case. The guys are correct, when properly re-built the case is very strong. However you must keep it cool. I have a gearlube pump that comes on when the case reaches 185 degrees and shuts off at 170. The pump circulates the gearlube through a cooler with a fan mounted on it. The four cylinder is your best bet. If you plan on towing with it use the six cylinder.
Bob Jones