Actually on a 2.8 v6 the firing order is 1-2-3-4-5-6 and the cylinders are passenger side 1-3-5 front to rear and driver side 2-4-6 front to back
1324
1,3,4,2
18436572
18436572
1,8,4,3,6,5,7,2
1324
1324
153624
Firing is 1-3-4-2 on a 1986 celb with the 2.5L 4 Pontiac Iron Duke. The order is found on the intake manifold.
need picture of fuseblock for 1986 chevy k10 pickup
1-3-4-2
1-5-3-6-2-4