Thanks to all for the info on the parts book. Very helpful.
Thanks also re the thread about the gearbox remotes. Very useful re the various stages and I have now acquired one with a dipstick hole and 2 tapping and have fitted the switches from another box to prove that it should now have o/d on 2,3, and 4 but I now need a dipstick !
However I’m still not sure what gearbox I have - the only number I can find is on the boss of the clutch operating lever is 4 H 69 and now wondering if it’s from a saloon. The overdrive ref on the side is 22/61711 034276 which I think is ‘normal’ thoug