I would suggest you ask them exactly what they mean by "revised" - it sounds a little iffy to me. Most garages would explain full details to you, particularly if they really want your business!
1989 Fiat Panda 1000CL
Electronic Distributor
Metamec copper brake pipes
Currently immobile with a knackered gearbox
Replacement 5-speed 'box and new QH clutch in garage ready to fit
and is likely to remain there for some time yet due to my EXTREME
LAZINESS (and it's cold and wet out there - okay, so I'm a wimp) ...