This is a silly idea for a ton of reasons. You don't need power to drift, you need power to do burnouts. All those 4cyls (240sx, ae86, etc..) do just fine with ~100hp. Drifting isn't about making smoke, it's about control. You need a suspension that doesn't get upset easy, like IRS all the way around. The camber changes with the TTB and solid axle will kill you. Download a copy of the Drift Bible and trade your truck in for an 240sx. Remember it's about weight transfer and control, not smoke and tires.
PS: weld/spool diff is bad idea for anything that's gonna come close to the street. You will be "drifting" right by the cops turning at traffic lights... and your tires will last about a week.