I'm going to assume you're breaking in this engine outside.....if so, and your signature is correct (you're in Mass.), then you're going to need to wrap the head in foil, a 1/10 touring car foam tire, a small kid's sock, or something to keep the heat in.

If it's 40-ish degrees outside, you're going to lean the crap out of your engine to reach 230 degrees with a bare cooling head.....it's just too cold right now to get an engine up to that kind of temp. That's why tuning to a specific temp number is a bad idea, especially when it's cold outside.

Put something on the head of your motor, and understand that you'll likely be 20-30 degrees colder now, than if you broke it in during a 90 degree summer day.

And Josh is right....it'll be at least 10-15 tanks before the break in is done.