Anchor Porter Clone All-Grain Recipe?

I have searched around in the forums but I haven't seemed to find a recipe that has been universally accepted. Does anyone have a recipe they found closely matches the Anchor Porter?

http://chris.norrick.com/norrickenbier/20a.html

Anchor Porter
Recipe Overview
Pre-Boil Wort Volume: 6.00 US gals Post-Boil Wort Volume: 5.25 US gals
Pre-Ferment Batch Volume: 5.00 US gals
Expected OG: 1.062 SG
Expected FG: 1.015 SG
Expected ABV: 6.20%
Expected IBU: 42.4
Mash Efficiency: 75.00%
Boil Duration: 60.0 mins
Fermentation Temperature: 64 degF

Fermentables
Ingredient Amount % When
US Pale Ale Malt 11.25 lbs 83.30% In Mash/Steeped
Belgian Debittered Black Malt 0.25 lbs 1.90% In Mash/Steeped
US Roasted Barley 0.06 lbs 0.40% In Mash/Steeped
UK Chocolate Malt 0.81 lbs 6.00% In Mash/Steeped
US Caramel 60L Malt 0.75 lbs 5.60% In Mash/Steeped
US Carapils Malt 0.38 lbs 2.80% In Mash/Steeped

Hops
Variety Alpha Amount When
US Cascade 6.8 0.8 oz First Wort Hopped
German Northern Brewer 7.1 0.8 oz First Wort Hopped

Yeast
Wyeast 1056-American Ale

Water Profile
Target Profile: Dublin (IE)
Mash pH: 5.2
pH Adjusted with: Unadjusted

Total Calcium (ppm): 118 Total Magnesium (ppm): 44
Total Sodium (ppm): 16 Total Sulfate (ppm): 85
Total Chloride(ppm): 19 Total Bicarbonate (ppm): 102

Mash Schedule
Mash Type: Full Mash
Schedule Name: Single Step Infusion (151F)

Step Type Temperature Duration (mins.)
Strike/Dough in at 165 degF 5
Rest at 151 degF 60

thanks! interesting with the debittered black and only first wort hopping.

This clone comes from the book "Beer Captured". Made it last year, and it was amazing.

Quick question. Are both hops put in the same time fo a 60 minute boil?