72′ Charger engine advice

What's up everyone. New to the forums here.

Just got my first muscle car a few weeks ago, a 1972 charger se. It's got a v8-318 4 barrel carb. The car is big and heavy (4000lbs) frankly I don't think that 318 is gonna cut it which is why I wanna put a bigger more powerful engine in it. I was looking at the mopar crate engines online and they all seem overpriced 9k-40k. I'm not looking for a 2500 hp engine for $100 but I'd like to have more power then the average Joe. What do you guys recommend engine/performance wise?

Also what is the value range on a 72'? I know it's not one of the most desirable years like the 68-70. I plan to mod this car to show car status but id like to think later on I could get ballpark what I put into it, even in trade, someday I'd like a 68-70 charger,70 cuda, or a 59 Cadillac coupe.

Thanks guys
Author: Nightmare