You will definitely need a DC shaft with the lift those slinky’s will give. Per my experience with Slee brand 4” castor plates and 3” of lift the DC shaft worked perfectly. I began going taller and taller up to where I’m at now about 5.5”. As you lift the pinion will rise proportionately...
Yes, castor plates were the main go to castor solution for a long time while Slee Off-road sold the only aftermarket leading arms to be had here in the USA. Plates are inexpensive by comparison so if you decide you don’t like them not much is lost.
If you do go with Delta arms don’t...
Yes especially since your rig will be lifted more than the advertised 75mm of those slinky coils. If you are serious about crawling rocks and beating the rig hard you want the most durable solutions. If you were going with a sub 3” lift then the eimkieth brackets would be great. The last...