Not just another garden veriety air filter either, I wouldn't bother with it if it was, i'd just keep the 3 inch filter thats on there now and not cut the bonnet and jam the L88 on the bonnet with no hole.
Got a Genuine Mr Gasket air filter from the states with the butterflys at the front and it has the Mr gasket logo imbossed. The thing is nearly 2 feet long. The other one I have got from the states is some long gone not seen for 30 years Edelbrock thingy. The edelbrock air filter seems to be the go at the moment though.