Skip the OE-R lifters. Use the LS7 replacements. Reason being is the OE-R have a small preload and the stockers have a huge preload. What this means is if you put in the OE-R's you should measure each rocker and get custom pushrods to keep them from clacking etc. (common) The LS7's are the current replacement for our stockers. Purchased as a set of 16 from most shops, they'll be cheaper than buying the 12 pack. The stockers having a great preload will adjust themselves (simplification of what happens) to absorb or give if needed for the valve train.
Going with a cam like that, I'd suggest either 105 or 130# springs. The double would only be needed on 130# springs or higher.
