Stranraer beat Livingston 5-2 at Stair Park in the first leg of the Ladbrokes Championship play-off semi-final on Wednesday night.
Jordan White gave Livi an early advantage but goals from Mark McGuigan, Andy Stirling and Willie Gibson had the Blues 3-1 ahead by the break.
Liam Buchanan reduced the deficit but McGuigan and Gibson ensured that Brian Reid's men will take a commanding lead to the Tony Macaroni Arena on Saturday.
In the League 1 semi-final play-off, a Chris Duggan double - the second a penalty - saw Queen's Park beat Cowdenbeath 2-0 in the first leg at Hampden.
