Kurt builds a good motor, he uses the Olds Drag racing heads.
He's better at answering emails than phone calls. Give this a try.
I believe he's leaving Thurs afternoon for Cambridge so you might need to wait until next week to catch him.
If you want. PM me with all your questions and I'll try to get the answers. Make sure you tell me the boat and customer's name so he knows which set of motors your discussing.