Hi Tommy, welcome to mightyram. Well, what's your budget and what do you want from the truck? The G63B engine responds well to a carb swap and a set of headers - these are the 2 most popular upgrades for performance. The twin cam variant of the G63B is a good option for a drivetrain upgrade but requires a few mods to get it to work as a RWD engine (it is possible to just swap the head but once again there are a few mods needed to set up the twin cam belt path and coolant pipe routing). Then there is the G63B twin cam turbo which will really get it hauling. Guys are using small block V8's - there are a number of members who have either done this install or are in the process of building it. MightyMax' came with a 2.6 which is good for torque but has nearly the same HP as the G63B SOHC. Try out the search option and check out members build threads for inspiration - you'll get everything from mild to LSRMikes demented spaceship pretending to be a Mighty Max - http://www.mightyram50.net/vbulletin...-Modifications