Camaro: Cadillac-designed platform developed at Nurburgring; will arrive with next-generation small block and a standard transmission. Put the Corvette motor in it, call it an R/T and watch them roll out of the showroom. With that platform and engine, a Jeggs catalog, and about $2K in cash I will smoke anything short of a ZR-1 (and that includes anything European, short of a supercar like a Gallardo.)
Mustang: Solid rear axle so that the 6 cylinder model can sell at the right price point. Most powerful version (500hp supercharged Shelby) still slower than base Corvette (400hp naturally-aspirated.) More cheesey doo-dads and plastic chrome junk than a Tijuana taxi.
Challenger: Mercedes E-Class platform design made with cheaper materials; comes with a motor called a "hemi" (which it really isn't) made in Mexico. Probably won't see anything past a five speed automatic. 360 hp ain't gonna hunt in this group.