I've been asking the same question lately since I'm looking into putting a dry sump on a 5.4 mod motor for my dad's little project, and both of those companies have been recommended. RCR who built his car recommended AVIAD as that is what they use for their race cars, while Turn Key recommended Dailey because they are apparently quite popular in the off road crowd.
Sorry to be that guy that is going off of second hand info. If you wait long enough I might be able to provide some first hand experience
Matt
Brian Hobaugh SCCA National Tour June 2014
First Hemi 'Cuda Convertible Ever Built
Short clips: Goodguys Pleasanton autocross and pit videos
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