Unplug the MAF and run it. If the MAF is faulty you will notice a difference straight away. It defaults to saved settings. Bit sluggish when cold but runs fine once warmed up.
Be careful of the cheap chinesium copies if you buy a new one
Many thanks to @doriz Thanks to Lee I now have my own Nanocom and not relying on having to go to the yard and use the one up there. I'd noticed last week he still had it for sale so bit the bullet and dived in. Sorted our transaction out monday and took delivery wednesday. Had a few problems...
Exactly Tony and his son used to specialise in working and making road worthy cars from the 60 and 70's, so have a good knowledge and tolerance of the older vehicle.