With eight competitive runners missing as they are in the US on scholarships, Stevenson said the field for the 8000m was not strong.
''I feel he can defend it, but it's going to be hard because I don't know how he's feeling within himself - I spoke to him on Thursday and he felt strong.''
Broadhead is likely to find that clubmate Cameron is one of his biggest rivals.
''Tony is the reigning champion, although Jason has only just moved into that age group and his history is a lot better than Tony's, but they are good mates,'' said Stevenson.
Also in the mix will be Christchurch's Chris Martin.
''(Martin) is very good, but if it comes down to the last kilometre, Jason will have him.''
And if either of them make a mistake, Broadhead could ''nail them both to the wall''.
''Tony is very strong at the moment - he always is - and he's a very good trainer. If he's out there, he gives it 110 per cent.''
Broadhead and Cameron are not just out for individual honours, they have also teamed up with highly fancied Steve Rees-Jones from Hamilton to compete for the over 40 team title representing the Waikato/Bay of Plenty.
''Those over 40 races are the most competitive of the whole thing,'' said Stevenson.
Lake City Athletic Club vice president Pam Kenny said Howard was a regular at national championships, both road running and cross country, and may well secure a top three finish in her race.