As been mentioned, avoid the AMT Daytona Charger like the plague! The Revell Daytona hands down is a much, much better kit! Not hard to build, and lends itself to some very nice detailing. As far as the Superbird, Johan made the better of the two as far as body accuracy is concerned, but falls short in chassis details.
Also the Johan kit is 1/25 if that's important to you. Be prepared to do some searching for the Johan Superbird however! They do turn up on eBay from time to time, but unbuilt examples can go for big bucks. Easier (and cheaper) to find a rebuilder that hasn't been glued to death.
Here's my Revell Daytona I did a bunch of years ago. I have two more of these kits to one day kitbash with my rebuilder Johan Superbird.