Degree Wheel for porting?
 

So like the title indicates im looking for a degree wheel or information to determine port timing for porting purposes other than what mazda says is stock port timing per series and the "companies" mass produced templates. If anyone could point me in the right direction id appreciate it. Thanks

go on nopistons and search for lynn e. hannover. find his posts on port timing. prob more than you will ever want to know about it from him. super intelllagant gentleman.