i have the Datsun 510. for what its worth, its a good kit. its a little more detailed than Revell's kits usually are (ie: it has a seperate gas tank) and its not that hard to fit a small-block Chevy in it .
i havent built it yet, and ive never gotten the Monte. i would also recommend the '78 Trans Am 3 'n 1. taht was my first kit and ive developed a bond with it. well, gotta go. later.
Jon