I'm currently repurposing a Globe and a King into 6x6's.
The short wheelbase
Globe is getting a replacement 2 spd. gear reduction transmission with built in transfer case, like this;
http://www.wtbcar.com/shopping/index...product_id=203
I just recently saw a Utube that added a 5:1 planetary gear reduction box bolted between motor and above 2 sp. tranny to get realistically slow road speed.
http://www.wtbcar.com/shopping/index...product_id=585
The longer wheelbase
King is going to keep the stock 3 speed tranny with a 4:1 planetary gear reduction bolted on the
output;
http://www.ebay.com/itm/like/1319998...&ul_noapp=true
going into this 2:1 transfer case
http://www.wtbcar.com/shopping/index...&product_id=91
Hope this helps...