Well i got the fan, the core an the box assembled an installed under the hood, now im to the wiring. Its a 72 with no ac. ive got the part of the harness that plugs into the control on the side. It seems it goes from there and splits, one part goes out to the fan itself the other part(three wire with clip at the end) goes to the relay that was on the heater box in the cab? Is this correct?. If so, how does it hook into the rest of the under dash harness? And also i need to get the relay that goes on the heater box in the cab. Mine crumbled when i took it apart. Who might have this? Any help would be great, its startn to get a bit chilly out here. thanx in advance!!