I have recent info that mr Nicholas is breaking a Sprint. If it has a good engine that you can hear running I'd buy it and then strip yours down.
Alternatively you could put a TR7 8valve engine in it for a few months while you do the same...and thay are dirt cheap...
Fifty quid will get you a runner on ebay...
Okay you loose a few horses but at least it keeps you mobile...
Jonners
Note from Admin: sadly Jon passed away in February 2018 but his humour and wealth of knowledge will be fondly remembered by all. RIP Jonners.