having the lead in the rear end can help but as with every chassis change it can also hurt. What it will do when you lead the axle is help you come off the corner a little better but at the same time you are litterally putting rear steer in it like a Monster Truck. So instead of going down the straights like this: l you will be driving like \ trying to stay straight. It can cause bind in your chain which isn't good on big tracks that require as much speed as you can get. as for castor blocks, sorry thats a secret. Left rear cross in and out, this will alter your cross, depending on washer placement on the front, 65% to 73ish% just with the flip of the left rear pills. These things love cross remember that just make sure you can hang on to it. Hope this helps some, good luck on the season, and congrats on buying the fastest chassis in production.
