Replied to you over on Facebook, but here goes.

Basically no, the Revell Challenger and Camaro kits represent the vehicles as you see them since they came back onto the market.

There have been a few cosmetic changes for some of the special models, like the Camaro ZL1 I think has a different motor (same as what is in the Corvette ZR-1), and some body moldings, but otherwise is the same car. So a 2013 SS, would be the same as the 2010 SS, and everything in between.

Ditto with the Challenger, some subtle differences for certain special versions, but otherwise the same car.

The only one that has changed significantly is the Mustang, and will likely change again for next year's 50th Anniversary version.