Over here we have found that Eibach suspension works extremly well in the Monaro. We tried many different set-ups of Bilstein, Koni, Monroe etc etc but the Eibach were the best ones by far. They lower your car by an inch, give a nice ride and never hit the bump stops or bottom out. It's a smooth plush ride, push it into a corner and it will sit nice and firm and sure footed but definetly not rattle your teeth out. If you fit 19" rims you will need to go for coil overs tho. If you want some advice on the best package to get for handling suspension set-ups that give a firm, plush comfortable ride leave your strut brace on, use the above mentioned Eibach and 18" rims with either 245/40 or 235/40. If you go any higher then 18" rims you start to sacrifice ride quaility and you will ruin the ride. The chasis is tuned so well from the factory it doesn't take much to make it a little better and still keep ride quality without sacrificing handling.
I have noticed recently over here that Edelbrock has been having a go at our market in shock absorbers and other suspension componetry. How do you guys find Edelbrock over there? From the feedback I have received so far they seem to be very stiff and give a hard ride.
You guys make 300-330rwhp already? I thought you had 348hp @ the flywheel?