The hard parts you need to cool an LS-powered NA or NB. Radiator, fans, upgraded wiring and hoses. These are the parts we use on our own cars, tested with years of hard use and proven to be effective. They're also custom-built for this application so they fit right in - no bodged up generic parts!
Note that the radiator can take our FM fan kit in either an NA or NB. If you want to use factory NA fans, they will also bolt on. Factory NB fans or Brand X fans that are designed to go on normal NB radiators will require the extra brackets.