Okay, let's get realistic. A 383 was used in Roadrunners and Chargers with great results for years. This engine is a chameleon,...it can be what ever you decide you want it to be. A four barrel intake with an Edelbrock or Carter 750cfm carb, a moderate or mild cam, and dual exhaust.
Then motor on in comfort, with plenty of torque and power available.
I have run many a vehicle this way, with great success.
Is a 3.23:1 gear better than a 2.76:1, depends on your goals, moderate acceleration with lower rpm and as much mileage as a car this size can expect, then 2.76:1. Yes it will still burn rubber if you want to.
If you want more acceleration, can tolerate higher revs at speed, and do not mind a moderate loss of mileage, the 3.23:1. There can be no doubt that this ratio is a notable change from the 2.76:1.
Learn the car, experience what it offers now, establish what speeds you like to cruse at, and then use one of the free internet rpm calculators to see if those numbers (from each ratio) are still comfortable for you. If so, then proceed with the gear modifications.
Knowing the rpm goal, go look at various cams specs (effective rpm range) and try to pick one that gives you the response, power point, and remaining rpm range (for when you stand on it at cruise, and you will!), that fits your expectation.
Whether you change the cam or not, or whether you change the gear ratio or not, the other modifications I mentioned will still bring you performance upgrades and a considerable amount of pleasure.
These are the simplest of upgrades and the least expensive approach. Many a backyard mechanic has made carb, intake, and dual exhaust changes over the past few decades, with many a smile upon their face as a result,....me included.
The least expensive modification is to enjoy what you already have.
Regarding the 440,....don't be smitten simply by it's size and the fact that it is "the big dog". I does offer a notable increase in the things that cause us to smile.
However, they don't just slip in and often require numerous accessory and other items to be adjusted or replaced. I have swapped 440's into both B and C bodies to replace a 383 (or something smaller if I am being truthful) with great success. It does take work. It also takes the right 440. A mid-70's smogger motor or a high toque low HP truck or motorhome motor, will probably not make you happy without them receiving some specific attention to reset them to what your goals are.
Truthfully, do not let yourself get carried away and just start making rash and assumed performance desisions.
Enjoy your ride,
Jim
