That all depends on if you tow or not and where you are located geographically. If you tow you wold want to stay with the 62 series turbos like the SPS62 or the HTT62 turbos. If you don't then a 66 series turbo would work better for horsin' around but you may want to limit the boost with one of those or you will need to address the head gasket. At hgiher altitudes, the bigger turbos will want to surge so that would be a consideration as well. Next, with any turbo upgrade you will need fuel for it. The next would be a set of gauges to watch everything. Then, a cold air intake along with some better exhaust would be helpful for sure to try and keep things cool.