Here is the firing order for both V8 engines offered that model year. Hope this helps.
Firing order 1-8-4-3-6-5-7-2
Front of Vehicle-------2-4-6-8
Distributor rotates clockwise
The firing order you gave is the same as on the one on the block. I put the number 1 plug wire in the #1 spot on the distributor cap and the rest in the order going clockwise. the engine will not start or even turn over. When I tried counterclockwise at least the motor would sputter a little. I know this is the issue because the motor would run before I messed with the distributor cap order. Any further information would be great. To clearify I put the #1 plug in the spot with the 1 above it on the cap and the rest in order going left, Clockwise.