Neil,
I have an engine dyno setup for the gmc engines. The dyno has guages for oil, temp and rpms. I broke my 302 in on this run in stand/dyno. Unfoftunately this dyno stand is up in St. Helena, CA right now with a 270 sitting on it. It does sound like you could break the motor in on your frame. When are you planning on fireing it up? I might have to go for a little ride just for the occasion. I love the sound of a new motor firing up for the first time.
John