Mainly it's just a question of getting the right sized adaptors, running in the pipes or wires and mounting the gauges, a few hours work really. I'd strongly recommend going for electric rather than mechanical type gauges - I've had my capiliary split three times on my oil pressure gauge. Not much fun when it sprays oil at 80'c and 70psi at the drivers side brake disc [xx(].
The electric ones don't have capiliary lines, just transmitters that screw straight on to the engine, with wires going to the gauges.
Good luck.
Pete.
Cinq sporting 1242cc
http://mysite.freeserve.com/close_to_cracking_up/
http://autos.groups.yahoo.com/group/Cinqs_and_Seis/
http://www.clubcento.co.uk/