Is this a reasonable PG Pliny clone?

To start, I am a noob. I also want to try this beer that is supposed to be great for hop-heads. That aside, I put "Dude's" Pliny clone into BeerSmith (which I am really new at using) and converted it from AG to PG. I only have a mini-cooler that can do about 1.5gallons of water in it to do my partial mash. My pot is a 3 gallon. Both of these pieces of equipment have worked well for other PG recipes.

Does this recipe look right to any of you that may have experimented with the PG version of Pliny? Feel free to post other PM recipes for Pliny, please!

One last thing, if this recipe is correct... what would be the water temp and time for the mash in my cooler?

6.75 lb Pale Liquid Extract (8.0 SRM) Extract 61.30 %
2.80 lb Pale Malt (2 Row) UK (3.0 SRM) Grain 25.46 %
0.73 lb Cara-Pils/Dextrine (2.0 SRM) Grain 6.65 %
1.50 oz Chinook [13.00 %] (90 min) (Mash Hop) Hops 6.1 IBU
2.75 oz Warrior [15.00 %] (90 min) Hops 64.9 IBU
0.50 oz Chinook [13.00 %] (90 min) Hops 10.2 IBU
1.00 oz Simcoe [13.00 %] (45 min) Hops 17.5 IBU
1.00 oz Columbus (Tomahawk) [14.00 %] (30 min) Hops 15.8 IBU
2.25 oz Centennial [10.00 %] (0 min) Hops -
1.00 oz Simcoe [13.00 %] (0 min) Hops -
0.72 lb Corn Sugar (Dextrose) (0.0 SRM) Sugar 6.59 %
1 Pkgs American Ale (Wyeast Labs #1056) [Starter 1000 ml] Yeast-Ale

Dry hop additions to follow in secondary.
Columbus, Centennial and Simcoe @ 1.25 ounces each for two weeks (or two weeks apart from eachother???)

The 3 gallons might be all hops at the end of the boil. Don't use leaf for sure.