I am gathering parts for a nice build. It will be used as a recreational wheeler mostly, but I am going to meet the requirements of the Legends class in U4. I have decided to go with Spidertrax axle housings. Now, should I use the Ultimate housing or the Pro series housing? The chassis will be a 4 seater GoatBuilt with a L94 6.2 and 6L80. Thanks any input will be appreciated.