I know mike sells the integy suspension and tons of integy stuff. But integy is made out of the wierdest metal I have ever seen. It bends and breaks with ease and its a huge mistake IMO. Get a used racer x and some GA bulks for about $350 shipped if not less. You can even get a used widetrac suspensions for around $125 shipped or less I have the wide trac for sale if you want it pm me. You can get used UE cvds for around 80-90 shipped too. I would go UE from the start. The ride might be a boat anchor at first with all the aluminum but you will just launch those Light race maxxs out of the way. Get the strobe slipper over the RR. Why don't you just build the whole emaxx from the ground up. It would probably be cheaper and you will get to know every part of you truck.

Oh yea and UE diffs 6 spyders can be found for about 135-200 used. Just got hit it right.