hey all. am wanting to put 3.9 diff gears in for extra acceleration. Just wondering whats the best way to go about it? should i go to a diff shop first? i found this on ebay for $260 http://cgi.ebay.com.au/Commodore-Ford-3 ... 4cf0699cec

Would that be worth concidering? i am unsure of what price i should expect for these..

Any advice appreciated.

Cheers.