Yea carleton, envy is right. I have never seen a car show that stipulates the engine size. They may stipulate that it has to be a numbers matching car or the original engine or something like that...but I've never seen a car lose because it was a V6. And a classic as well, a classic doesn't have to be a V8. A classic doesn't even have to be a muscle car. Any car will hold it's value well if it is well maintained.
As far as performance, you clearly want and need a V8. So again, make sure your budget can afford you one. If not, then a 2011 and up V6 Mustang will be your best bet. The Dodge Challenger/Charger is a heavy car. Last I checked the Challenger weighed about 4400 lbs I think. And that V6 cannot help move that much weight around. Even the R/T is slow (mid to high 13s) compared to the Camaro SS (low to flat 13) and Mustang GT (low 13 to high 12). And considering the engine size and output of the SRT-8, even it is heavy enough that it is slow for it's output. I'd guess your Dodge V6 is about a mid to high 14. The Camaro is around 3800 lbs. Which makes the V6 about a low 14 second car. The clear winner is the Mustang V6 which is a high 13. Headers, exhaust, intake, and a good tune and I'd put money on the Mustang V6 over a stock R/T Challenger. And you'd probably spend around $1500-$2000 for all that. And that is pretty fast. Not to mention that it will be more fun to drive because of how light it is. I drove a 2010 Mustang GT and that car felt soo light and fast while cornering as opposed to the heft of the Camaro SS. Even the Coyote felt significantly lighter. So it isn't all about the size of an engine. Those 370Zs are low 13 second cars. And they are N/A V6 engines. You could even go forced induction on a V6 Camaro. That's get you into the 12s definitely. But for raw out of the box performance, nothing really compares to a V8...except a V10!!
2017 Camaro ZL-1 A10
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