There are pitfalls with using spindles like clearance between the inner face of your rims and the suspension components. Obviously more drop = less clearance. As pennyman has recommended, use something like blocks/spacers to shim the centre carrier if your truck has got one in the drive line - it will save wear and tear on your universal joints. The closer to keeping the tail shaft aligned from the gearbox to the diff, the better. These trucks don't have race car handling to start off with - I've thought about using an adjustable aftermarket coil over/shocker combo up front in place of the separate spring and shock set up. It doesn't look like it would take much to make it work, but it's only an idea...