Need help decoding VIN and engine number

Hi,

I am looking into purchasing a 1974 Dodge Dart Sport 318.
would anyone be able to assist me in decode the VIN and engine number?
VIN: LL29G4B478243
Engine: 5M31809050431

Apparently matching numbers, but I am not sure about the engine.
Is there any way to find out if this has already disc brakes up front?

Also I just realized that this car had a sun roof prior the Restauration which was closed as it caused more trouble than joy.
Can this be confirmed via the vin?

Thanks,
Antonius


Read here...

How to ID a Small Block Engine Block: