So you think 456 gears and a 267 duration is going to make this Op happy on the Florida 70 mph freeways? When he only goes to drag race 10% of the time and likely it will be less than that?..
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4.56 gears, which I run on a 90+% street car are great......if you have an OD. If you don't it is an around the city deal only, 4,400 at freeway speeds would be maddening and not good for the engine either.
The highway would actually make a big cam happy, especially assuming it's turning some R's. My car runs around 2,600@60 but if I wheel it 75+ down the interstate it loves it and is in the 3300RPM range. Smooth and happy. I've had modern car spin that at interstate speeds.