From my calculations, at a 75% efficiency, you would have a starting gravity of 1.075 (1.070 with 70%). The description of the beer states it has an OG of 1.068. How much higher are you looking to go with the gravity?
If you're looking to maintain the mouthfeel and body of the beer while upping gravity you could decrease the carapils-dextrin to 1/4lb and up your base 2-row by a pound or 2.
Also, the recipe you have written here will not make a deep ruby colored beer, but more of an amber. If you are looking to get a nice rich ruby color try adding an ounce or two of black patent.