Conversation so far:
When did Alan Kulwicki start racing?
Kulwicki began his racing career as a 13-year-old kart racer.
Was Alan Kulwicki able to race cars at the young age of 13?
Kulwicki began his racing career as a 13-year-old kart racer.
What type of racing did Alan Kulwicki do at 13?
Kart racing or karting is a variant of motorsport road racing.
Was Alan Kulwicki a successful race car driver?
Despite starting with meager equipment and finances, he earned the 1986 NASCAR Rookie of the Year award.
Did Alan Kulwicki win any other awards, besides the 1986 Rookie of the Year award?
In 1979 and 1980, he won the WIR late model track championships.
What else did Alan Kulwicki do in 1979?
In 1979 Kulwicki began competing in regional to national level events sanctioned by the USAC Stock Car series and the American Speed Association (ASA).
Did Alan Kulwicki do well in the national level events?
Kulwicki's highest finish in the ASA season points championship was third place.

Question: What was the biggest highlight in his early career?
Self-contained rewrite: What was the biggest highlight in Alan Kulwicki's early career?