I have a 69 fatsback that I want to cruise with. I want great low end and good highway cruise range (a/c too!!). The car has the 351w now and I was wondering, would upgrading to the 460 be a good choice? I'm look at the cubic inches. I was thinking with the 460, I could go with 3.08 gears and get gas mileage and performance, rather than 3.73+ with the windsor..... Anybody got a suggestion?