Is it easy to wire them up?

I'm getting oil pressure, air/fuel mix & a boost gauges.

Anyone know of any how to guides?

Or am i best just taking it to the garage & getting them to do it?

 

There is alot of info in this forum, try a search.
This might help.

https://www.scoobynet.com/734744-gau...d-boost-3.html

 

Easy enough to do if you have the patience. About a "two spanner" in a Haynes guide.

Just take your time and route wires sensibly, plus make all connections properly. Half a day should see it done.

I ended up with a bad earth on my Defis, and I reckon to be pretty good with electrics