Bit of googling... Croix de Fer forks are 387mm a2c, trucker 700 disc is 390mm. Think they are both 45mm rake. Disc equilibrium are 375mm apparently so would be more likely to mess up your geo...
If you're not talking about the Croix de Fer feel free to ignore all this rubbish.
There are 2 versions of the disc trucker fork:
26" disc trucker fork Axle-to-crown: 376mm Rake: 45mm
700c disc trucker fork Axle-to-crown: 390mm Rake: 45mm
ignore the name, the 26" works fine with 700c wheels and has a clerance of about 355mm (x 60mm wide at the top) so there is room for 35mm tires. The main drawback is it is pretty heavy: about 1.1 kg.
There are 2 versions of the disc trucker fork:
26" disc trucker fork Axle-to-crown: 376mm Rake: 45mm
700c disc trucker fork Axle-to-crown: 390mm Rake: 45mm
ignore the name, the 26" works fine with 700c wheels and has a clerance of about 355mm (x 60mm wide at the top) so there is room for 35mm tires. The main drawback is it is pretty heavy: about 1.1 kg.
http://www.bike-components.de/products/info/p32487_Long-Haul-Trucker-Disc-26--Gabel.html?xtcr=4&xtmcl=disc%20trucker