... oh and another thing
You'll need to modify the transmission tunnel and get a rear mount for your gearbox if you want to run a 4 speed (or pretty much anything other than a grey crashbox).
Have a search in this Modification Help area for "RTA" or "engineer" in the last 365 days. You'll find this topic has been discussed quite a bit, and there are phone details for Lohning International engineers, who quite a few guys in the NSW club have used and been happy with. John Varetimidis from Lohning is the guy who does the engineering comments for Expression Session in Street Machine, and he's pretty approachable.
If you know what you'll need before you start, you can at least have some sort of a plan and a budget for the project. Like all car projects, expect to blow that budget. By how much is up to you and how far you let the scope of the project increase....
Oh and you should be able to use that link now you've registered on the site. Guests can't use Private Messaging.
cheers
RET