Back to the original topic. I have +1.5mm valves in my 250 head. Each one was custom made by APE for $60.00 each. If you want Ti, they are $150.00 each. I also recently talked to Jeff about SS exhaust valves. He said he could custom make those for $50.00 each or so.
After all that, know that I am not nay saying anything....hell I want to see what you can do. I just want you to share some of your secrets with me.