need engine help
 

I have misplaced the photo of the heads I had taken when I removed them for the machine shop.

which valve spring retainer goes on the intake, and which on the exhaust? one rotates and the other is stationary. I am thinking that the retainer that rotates is the exhaust valves but I am not 100 percent sure.

any help would be greatly appreciated!

The rotator goes on the exhaust valves. I did away with mine on the advice of the shop that rebuilt my heads.