Use amber malt!
60, 90, and 120 minute are all just pilsner and amber malt, and they use the same hops. Here's a recipe based on a scaled up 60 minute:
Batch Size: 5.5 gallon
IBU's: 50
OG: 1.067
Grain:
12.8 lb Pilsner Malt
0.70 lb Thomas Fawcett Amber
0.70 lb Crystal 60l
Mash at 150
Hops:
26...
Straight from the Stone website, most definitely Duvel yeast:
http://blog.stonebrew.com/index.php/cali-belgique-the-untold-story/
http://www.stonebrew.com/epic/Wca256c660276b.htm
Most of the book is an in-depth history of IPA, from development to the modern era. There are charts of the IPA's produced during certain periods with their various gravities/ibus/srms etc. The recipes alone were worth it for me; there's stuff from firestone walker, pizza port, deschuttes, hill...
Short's Key Lime pie was pretty bad. Way too much fake lime flavoring.
Shipyard smashed pumpkin is just terrible. It's like getting beaten in the face with a sock full of sugar and nutmeg.
My only issue with "Belgian IPA" is that it's ambiguous. There are the american IPA's with belgian yeasts (stone's cali-belguiqe, raging *****) and then there are the hopped up Tripels (achouffe, etc). We need better nomenclature to differentiate the two.