The score racked up by competitors is compared with the time it takes to complete a round to decide final scores. Competitors are only allowed to maximum of seven clubs.
Willis said he used five with "the trusty wedge" doing most of the work.
Rotorua's Steven Holloway was the leader after day one when he shot a 73 and ran 43 minutes and 44 seconds for his round.
Willis shot an 88 and ran a 41.08.
"I would normally shoot an 83 or 84 over a normal round so I'm pretty happy with that."
Former Eisenhower trophy rep Phil Aicken has qualified in 10th.