Check out Aussie Mikes Gallery - he has a great intake on his LS1:
Im sure he can supply all the details. You would need to use a newer L76\L98\LS2 though in NSW, and they will all have electronic throttle control. I think you could adapt this setup to it after rego, but it might be a bit of mucking around just to get that look...bloody good look though!!
L76\L98 is 260kw plus out of the box - and with a cam you will get 300kw+ (400hp) at the wheels. Seriously, the other option is a ford boss, they are a huge motor, and will not fit into all kits.