Isky, piper, kent, schrick or what the cam manuf recommends. If you do some measurements you may find another car has the same sizes Jon
I'm no expert, so treat everything I say with a pinch of salt. In your position I would look at how easily you can gain an atmosphere extra. More comp, same RON generally means less advance in the middle rpm range, as I understand it. Mappable ignition and a rroad with some pinking headphones and a lot of rr time to set it up. In other words, make a decision and give it a try. Then tell us when it turns into a pile of poo, so we can all learn...