The cost savings with rock auto is crazy sometimes. I priced out $600 worth of gaskets, seals, steering pump, water pump, etc for my LS that is going into my 59 apache. The same parts list and much of it even the exact same part (brand) from a old timey parts store that my girlfriends brother works at, Sure Fire (a division of carquest I guess) was like $800 and that was even with me eating the cost on the core for the rock auto steering pump.
Oh, and always google "rock auto 5% discount code" if you don't already have one. The first search result will usually give you an active code