<VV> Corsa Dash Install questions

[rich dixon]

Would like to know what's involved with installing a Corsa dash in a Monza - it's a 1966. 
1. How do you attached this to the Monza's wiring harness so everything works, what modifications are needed if any.
 
2. Tach hook up - what gage of wire, and where is this attached on the cluster and the  distributor or? 
 
3. Vacuum line - do I just run a plastic tube to the engine and where is this connected to on the engine?
 
Any other tips and suggests are welcome. 
 
RD