I had CME rebuild the matching number 318 for my Shelby Dakota. The stock engine had 170hp when new. After rebuild, pro comp heads, mild comp cam, eddie RPM, 680 Quick Fuel carb it dyno'd at 347hp/358ft#. The only down side I ran into was time. they initially quoted 6-8wks, but ended up being nearly 3 months. don't know if that is typical or if it had to do with the custom build. very happy with the performance.
