I have to agree with Mike. I had a 351W built for my SPF, and had a tuner in town break it in on an engine dyno. We discoverd an issue with the metals mated between the cam and distributor gear. That was easy to fix. The peace of mind you get knowing all is well BEFORE you install an engine is priceless.
A good engine dyno has sensors for EVERYTHING! Knock, air/fuel mixture, water flow,
oil flow, analysis for particulate in the
oil, and on, and on.....
A great investment! If you want to bring your engine to Portland, there's a great shop here that has the dyno and expertise to do the work. It's Sunset Engine Development (Pat Usher). 503-805-5252.