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Russ,
There is nothing wrong with the 351W engine as it is built today. Sure the olds ones of the 1970's were restricted breathers that were overshadowed by the Cleveland, but that all changed with the new heads, manifolds and cams available today. They certainly seem to be good enough for most of the Ford racers today! The GT-40 heads aren't the best available, but they are pretty damn good for regular street use.
There is something else wrong there, like timing, or carb setting, or restricted exhaust, or just plain lousy cam profile. I would check the first 2 first, just to eliminate those as variables. Then get yourself a better cam. That should wake that engine up. Get the cam that Ford SVO puts in their 385 hp 351 engine. That one works great on the street, has a nice aggressive lope and pulls quite well. You can get much better cams I'm sure, but you may give up something, like drivability. And if you emulate the entire Ford SVO engine setup, you can pretty much guarantee close to the same hp output.
I am running virtually the same settup you have, except for the engine apparently. What kind of pipes are you running? Could they be restrictive? A 3.7 or 3.9 gear would certainly help, but I would find out what is up with the engine first. I am still running a 3.3 final gear and mine pulls quite well regardless of the less-than-optimal ratio.
Charlie
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