the firing order on a GM HEI is 1-8-4-3-6-5-7-2
The marked # 1 position on the distributor cap faces towards the REAR
No-1 wire goes on the distribitor cap in the 7: o clock position clock wise when standing in front of your vehicle. 18436572
Number 1 on the distributor cap is the top post closet to the firewall. Looking at the distributor cap it would be... top row 1-3 bottom 2-4
where is number one on a vortex 4.3 v-6 distributor cap
The distributor cap should have the number 1 marked on it. The distributor cap is installed with the # 1 position facing the engine , slightly towards the drivers side of the engine
Front righthand side of cap
Should have a small number 1 on the top of the cap.
# 1 on the distributor cap faces to the FRONT / CENTER
# 1 on the distributor cap faces to the FRONT / CENTER
The marked # 1 position on the distributor cap faces to the FRONT
in number 1