I did this mod about a year or so ago and took all the pictures with my cell phone and the pics were horrible! Here is an updated version of it and I can say that I have been running this mod for a while and have no complaints. It works awesome and wheels and tire choices are awesome! I am currently running the Proline Titus beadlocks (p/n-2713-1x) with Dirt Hawg tires (p/n-1071-00) or as a combo (p/n-1071-13) but I haven't really ran them yet as I am still in the break in stage of my new TRX 3.3.
Here is the shopping list-
RPM Electric Rustler Caster Blocks 30 Degree p/n 80712
RPM Electric Rustler Front Bearing Carriers p/n 80372
Traxxas Suspensionn Pins 2.5x31.5mm w/ e-clips p/n 3740
Traxxas Electric Rustler Front Axels p/n 3637
Traxxas Hexes and Axel Pins p/n 3654
Ok now with the mod!
Here is the before picture with the stock setup-
Pic with replaced parts removed-
Difference between the two spindles-
Drilling out the bottom of the new caster (where a-arm connects) with a 1/8" drill bit-