Your mast rake will depend on the mast you have, whether it is a Selden mast or a Holt-Allen. The Holt-Allen masts are stiffer so they require full spreader rake to make them bend. The Selden masts have more bend and will therefore give you more performance, from a racing standpoint. What I mean is - they are faster.

Mast rake from mast tip to transom on a Holt-Allen mast should be 243 inches, rig tension should be 22 lbs on the Loos gauge.