I just looked at the Trick flow kit, and all the studs are 2-1/2" long, no short/long, but they changed the location of the shaft oiling hole in their heads.

I also just recalled that I am using the aluminum max wedge style shaft hold downs on my victor heads (after milling off the original stands), so that is why my rocker hold down studs would be longer than if using the standard HS hold downs.