Aloha & looking for help.

[gfgumball]

Greetings from Oahu! I joined in June but I've only been a 'viewer' up until this point.

I have 2, 92 metros on island, a base model and an LSi. My base is under cover right now awaiting some body work after 2 hit and runs! My LSi, 'Bullet', is my daily commuter.
Through driving technique I've been getting in the high 50s for MPG but I'd like to take it to the next step. Specifically, I'd like to install an Alternator Kill switch. Can anyone provide me with a good DIY, step by step example of how to put an ALTERNATOR KILL SWITCH on a generation II Metro?

I'm also looking to install some gauges and I'm curious about the mpguino. Can anyone tell me how or if I can get this into a 92 Metro?
Thanks. Looking forward to talking with you all.