CHALLENGER QUESTIONS NEED QUICK HELPPPPPP

[69RSCOPO]

Hey guys I need some quick help being I'm trying to buy this car tomorrow morning...I just found this car tonight and he needs a decision by 10 am or he is posting the car for sale. 1971 Challenger it is manual brakes and I believe manual steering. The car is a 4 speed but not sure if original. I do not have the vin number as of yet. The car does have a console. The guy also says the 340 Engine is original to the car and he says the car is also an original scat pack. So I guess my questions are is there anyway to prove the engine is numbers matching? Trans? Also how do I tell if the car was an original 340 car and was all 340 cars R/T's ? Anyway to tell if car was a Scat Pack and what does Scat Pack mean? A lot of questions but please help guys..Thanks everyone