Those were my personal opinions, but I'll expand.
The 5.7L Charger/Challenger is a joke and shouldn't even be an option. 392 or GFTO, the 5.7 is useless in that pig of a car. Once you step into the 392, the only real one that's semi-affordable is the Scat Pack but to get it budget you have to strip all the options out. Good luck finding one at dealers for the entry price point, which they tout but it's nearly unattainable. Sure you can order one, but then you typically lose out on the incentives that are in place to get people buying them. Trust me I tried, most incentives are only available if you take delivery from dealer stock and they will likely never order base 392 cars.
Camaro is a similar story to the above. They try to sell it as affordable but they option up the trims so heavily that it's hard to get a decent performing V8 without all the excessive sticker bloat. Don't even say V6 because that's a huge LOL.
As for the mustang, I'll reiterate. MUSTANG LOL (If you couldn't tell by now, i'm not a mustang fan.)