I am changing the spark plugs in my 1989 GXL, and I've owned the car for a week. Well I (thought) I had the right ones but I only have half of the right ones. I bought a set of NGK BUR9EQ and those go in the top. But I am wondering what goes in the two bottom ones? NGK BUR7EQ?

 

i forget what kind but its in the haynes manual.

 

Leading - NGK BUR7EQ (2)
Trailing - NGK BUR9EQ (2)