i have a 1978 351-M think it was put in in the 90's pulled the wires to follow a firing order that was wrong stupid enough not to write the original one. need to find the right firing order

 

It should be imprinted on the intake manifold.

 

The firing order for the 351M/400 is as follows:

1-3-7-2-6-5-4-8

Also, I'm sure you know this but the cylinders are numbered 1,2,3,4 from front to back on the passenger side and 5,6,7,8 from front to back on the driver side.

Hope this helps.

 

Dist. turns counter clockwise too.

 

Fire in the hole!!!!!