[boxhead]

There should be some type of manual, but you say you have a roller, so I would be checking all steering and suspension (make sure all bolts are tensioned to specs).
Then fit driveline (engine, gearbox, diff, tailshaft, drive shafts), then brakes, then body (unless yours is prefixed), then steering system, then fuel system, then wiring, then interior and trim, lastly is body hardware (lights, windscreen etc)

Good luck with the build, and please keep us updated with a build thread (either not many getting built or no one is talking)