Rocker Arm Lengths

I'm currently trying to sort out the geometry on my heads with a 1.6 Harland Sharp rocker.

Its obvious that the shafts will need to raised dramatically as well as moved a fare way back to get it all right with a longer valve. And since i'm playing with a few sets of heads I don't want to mill the rocker stands down.

So I'm looking to buy another set of rockers that will give me a better starting point to get it right.

Can some one please give the measurements (Y) for for the Hughes and Comp magnum rockers?
Rocker-Ratio-Lrg.gif