I'd think the money would be better spent on other items. Since you asked I think The RPM would be overkill however a nice used CH4B or S/D intake would be a good choice. A vacuum 750 holley would work well but so would just about any carb besides the Eddy 750. I've been using this "crap" gas since it came out and have yet to have a gas related problem. As for the altitude issue I guess you'll have to see how much you drive 200 miles away. Headers and intake will help pick-up 25hp or so. Not sure how bad your heads are but even a set of 440source heads is probably going to pick you up even more. If HP gain is more important than EFI then the add ons is where you should spend your money. I guess it depends on what you want to spend. Headers, intake and new 440source heads is about $1100.00 If all you want is a strong good running 440, then just tune what you have and save all that cash for something down the road.