Z1OwnersClub GB

I have the chace of an early (73 I think) Z1. It has been stood for about 6 years and is in need of a fair bit of work. Shox, exaust(harris) clocks need re-newing, the rest will need sorting/powder coat/paint. Engine turns over, bodywork and frame seem fine.
Frame number is z1f 07631. Engine number is z1e 099705.
Can anyone give me a guide as to what I should pay?
Thanks

As much as you want. Bet that it will go for ?3k but I'd be reluctant to spend ?2k, that said it could be woth over ?10k with some hours and money spent so you won't loose out.

Scott looks like that's a 73 frame but the engine is much later from a 76 A4

Thanks guys, glad it's a 73 frame, pity about the engine being from a later bike. The engine looks to have the original black finish which made me think it was from an earlier bike. Never mind, I'm still going to see what I can get it for.
Scott