XJC and S type

[bxlbaz]

Hi Folks
Im looking at a 1977 4.2 XJC and a 1965 3.4 S type at the weekend, I know they are maybe chalk and cheese, but any advice would be welcome, placing of engine and chassis numbers etc.
Is there a site where I can check history, date of reg etc based on the chassis numbers ?
any help and words of encouragement or warning would be welcome
Cheers
Barrie
oh by the way where is the O/D switch on the S type, the seller is not sure whether it has it or not, I assume its dash mounted rather than gearstick mounted

[bxlbaz]

Thanks, it seems to be down for accepting registrations I will try again later