Mazda B2200 Rocker Arms?

I believe I have a cylinder head that might have the rocker arms in the wrong order. This is for a 1990 Mazda B2200 w/ carb. The rocker arms are marked 1-3, 2-4, 2-6 and 2-5. There are more than one 2=4 and they are installed on both the intake and exhaust sides. Is there a list that exist which shows the correct order for these rocker arms? It appears the arm are identical, unless I'm missing something.

Gary S
October 2010