Andrew,
The 320 degree camshaft sounds interesting, what lift does it have and what springs were you using on the head.

I am looking at making the A13 head a bit more manageable for use below the original very high engine speeds as you cannot legally run the 115/145 octane fuel the head was designed for these days. We are looking at a little decompress and replacement of the titanium valves with new 214N in the interests of a bit more durability. Titanium valves neck down and stretch with time. I want to run about 11.8 - 12:1 comp with a a smaller duration cam and a bit more lift.

As with dattomans head the head still flows like a trooper at .550 lift. This means a better lift cam and a bit more development with better springs and modded guides $$$$$ $$$$$$$ $$$$$ again.

Considering the works heads only run 0.460" lift with 328 degres duration I want to test the performance of a lower duration torqier cam with more lift.