I need help on car terms?

Question

My stepdad has 1971 Dodge Charger SE, and I'm going to have to sit with it in an upcoming car show and need to know some things, he gave me a list of things to know but I don't know what some of this stuff is. Can you help me with them?

What is a 383 magnum 4 speed?

What are 456 rear gears

and what does it mean when the motor is balanced and blueprinted.

Here is the entire list. I do know what some of this stuff, as it is easy, and I am not that stupid.

rare triple black 1971 Dodge Charger SE

383 magnum 4 speed

Mickey Thompson tires

all original leather interior

custom woodwork

625 horsepower

set up to run 10.7 seconds in a quarter mile at 126 mph

motor is balanced and blueprinted

Answer 1

The 383 is a big block Dodge engine.

The 4-speed means that it has a 4-speed standard transmission.

The 456 are the rear end gears ratio.

Engine balance reduces vibration and other stresses, and may improve the performance.

Blueprinting is the re-machining of components to tighter tolerances to achieve better balance.