Here is a snapshot of my number one cylinder (@ TDC) exhaust roller rocker,
My block is a stock roller cam block, the heads are Brodix IK200, head gasket
Clevite, CLE-5746, compressed height 0.026.
The pushrod is stock length and you can see the roller tip is just inboard of the valve stem centerline.
Maybe I was just lucky but stock length seems a good place to start.
Wezz The stock pushrod is way to short I can push the pushrod realy up and down. Like u see in the picture i post earlier in the topic
Have you adjusted it correctly ?