MCAI = Monaro Cold Air induction. $25 from holden. In conjunction with the 2 hole mod is the 2nd most effective CAI there is.
OTRCAI = Over the radiator Cold Air induction. The Powertorque one is about the best but hard to get as they are kept for their own clients these days and rarely sold singularly. Sureflow, G&D and a few other companies also make one but beware of fakes (ebay) as they arent as good.
Dont worry about the oil on MAF issue, just get a mafless tune and bin the maf anyway. In WA chipmaster is about the best and is one of the pioneers of LS1 tuning. QLD goto Powertorque, NSW goto Sams performance or Sonny at Mannaro's. GM Motorsport in Vic