I believe it is like all chevy's 18436572
1 8 4 3 6 5 7 2
See link
18436572
Firing order is: 1-5-3-6-2-4 Distributor rotation: clockwise
The firing order should be 1-8-4-3-6-5-7-2.
it is the complete opposite of Chevy
18436572
What engine? 250 ci straight 6
The order is 1-8-4-3-6-5-7-2
The firing order on the 350 Chevy is 1-8-4-3-6-5-7-2
1 8 4 3 6 5 7 2