Thinking of buying a Mustang - help needed

[Petrolhead]

I have been thinking about buying a mustange for a while but an not very clued up on them

All I know is I am after an early one, around 1965.

It seems to me there are a lot of different V8 engines and I keep seeing mention of Type A, Type C etc

I am also a bit confused by what sort of money I should spend, I have £20K buthave seen cars from £10K

For instance Malton Specialist Cars what look like a nice clean car for £20K, is it too much (I know it comes with a years warranty)