How do you find the number one injector on the 1988 diesel 7.3?

How do you find the number one injector on the 1988 diesel 7.3?
The right bank cylinders are numbered 1, 3, 5, 7, with number one being at the front of the cylinder block. The left bank cylinders are numbered 2, 4, 6, 8. The firing order is 1-2-7-3-4-5-6-8.