While the fenders are off hook up everything you can on the engine. Attach the inner wheel wells to the fenders and mount those on the car. Should also have the radiator support 8n by then.
Forgot to say you should check the 2 lower body bolt locations on the lower cowl area before you mount the fenders. It's easier to dig out the common broken off stud in the one hole and put a new nut clip in the other when the fenders are off. I also run a tap to clean up the threads on the other holes on the firewall, door jam and top of cowl. Makes life easier when bolting fenders on.