4x4 problem please help
No problem man. Get a uni bit to drill the hole through the firewall. Other than that, all you need is basic hand tools.
Alternative suggestion. Get rid of the fault prone vacuum system and replace it with a cable lock. One pull of a **** and you're locked in. I bought mine off of eBay for about $120, installed in half an hour, and it's worked flawlessly for 5 years. This is the exact kit here:

