Ok, so I got an at-a-boy bonus at work for completing a big project. A bunch of gift cards and what not. Well, one of them is a $500 AutoZone gift card. That goes a long way on the basic needs for my truck. Optima battery being one. Here's my question, on their website they have two timing belt/water pump kits, Dayco and Duralast. I know the Duralast is the AutoZone brand, don't know about Dayco. Has anyone used either of these kits? Both have tensioners, gaskets, etc. Is there a difference or does it matter. Or should I purchase another brand else where?