[storm9c1]

I'm fascinated by those old engines as well. The problem is that you have to know how to set one up and drive it. They need to be backed by a trans with many gears or a 2-speed rear splitter so you can keep the engine in the torque band. Those old engines with 2bbl carbs were designed like a diesel and cannot be revved. Which is foreign territory to those who are familiar with setting up a drivetrain for high performance use. These were truck engines. And they need to be used that way. 2000-3500 RPM all day long rowing gears, that's the sweet spot and that's why they lasted 600,000 miles. The 637 is a fascinating engine for a big truck. But putting it in anything else wouldn't be very practical. When it's running right, it will sound like a farm tractor at idle. It idles low!

If I recall, it shares some parts with the big v6 and ToroFlow diesel. In fact, there was a 637 ToroFlow offered, so make sure the one you are talking about is gas and not diesel.