Rubstic was owned by the former Scottish international rugby player John Douglas.
The win was even more remarkable as it marked the National debuts for not only the horse but also for the jockey, trainer and owner.
Rubstic came into the race as the smallest horse on the card and was seen as an outsider but he ran well and despite a mistake on the second fence from which he managed to recover he pulled away from Zongalero in the final straight to win by 2 lengths.
He fell for the only time in his career during the 1980 Grand National at the 15th fence before returning a year later and finishing seventh in 1981.
In 1995 Rubstic died at the age of 26 in Ladykirk where he had been living in retirement under the care of his former trainer John Leadbetter.