Call any parts house............the 1986 2.5 liter id 60 thousands........
.045
The Spark Plug Gap.060 (In thousandths of an inch)
.045 plug gap.
.044 gap on tubro
the gap should be .025
.32 to .35
.043
.035
.035
The spark plug gap is ( .044 inch )
I know that a 87 fiero gt has a .045 gap. It should but on the under side of the engine compartment hood on a little sticker. Good luck. The 2.5L Iron Duke has a gap rating of .060
.045