Congrats and welcome! Which VIN have you bought? It may well have a history of ownership here.
For full membership, you will have to be an MGOC member (or application being processed). OK, may sound a bit odd for a Rover owner, but since the MGOC hosts this Two-Sixties website, that is a requirement. I see you already have an MG "fleet" though, so may already be a member?
As Nich says, send a PM to Tim stating your email address for a new questionnaire to be sent if needs be. That will get the full-membership ball rolling.
P.S. Photos of the R75V8 would be nice.
P.P.S. #596 ???
David