Steve,
You might also consider using the 77-83 BMW three way thermostat which circulates the engine water through the engine until its rated temp is reached and then it opens and modulates the cool water from the cooling system through the engine. You can find them on E Bay for around $15.
Andrew,
I love the detail on your lakester! BUT (you knew there had to be one!) you should really consider using flared inlets on your injector tubes. The potential air flow increase can be as high as 15% and it is free. I have a great article by Dr. Gordon Blair (British air flow expert) if you would like me to send them to you.
Rex