The Question and Answer section for Love Medicine is a great resource to ask questions, find answers, and discuss the novel.
The only present tense might be, When the dust rises up and hangs in the air around the dancer like that, I feel good: the rest is in past tense. Notice the speaker is making a comment not directly related to the past tense moment. It seems to be...
Lulu's husband died in 1950.
Chapter Four, The Island, begins on Page 68.