Wheel hub bearings with large flanges?

[Ripper]

I'm about to make my own uprights for my 74 Firebird (don't worry, none of the stock suspension will be kept) and I'm looking after some kind of cartridge hub bearing.
The thing is that I'm going with Porsche wheels and the bolt pattern is 5x130mm (app 5x5,25") which means the flange must be big enough so I can drill holes for a new bolt pattern.
I need a flange that's app 6,4" to have enough material left. I've been looking at different models on E-bay and the Ford bearings looks like they have a big flange. The Ford Bolt Pattern is 5x5", right?

http://cgi.ebay.com/ebaymotors/89-90...1%7C240%3A1318

Anyone got any good ideas of which model to get from?
The bearing must be low profile so I can retain a low scrub radius.