A lot of the fact of what people run is vehicle weight and DA....A lot of guys that run headers, might only go to the track occasionally (or once just to try) and may have a bad DA and or not know their truck weight....I know layer1 only ran 14.9 with headers and Uprev, but he is 5900 LBS and lives in the mountains. The guys with headers to compare yourself too are (was) me, Titanss, Rossi, KHA4079 (although he has cams now), pinoytitan. I say this because these are guys like you who have gone out an searched for a good DA and have been to the track several occasions. I bet when I had headers, and ran 13.7, I bet I really wasn't any faster then another guy who ran 14.2 with headers in a different state then just went once to the track. I wouldn't mind for someone to try the swap and see, but I just don't like to hear get so amped up about doing the swap, when i haven't seen any BT Titan running away from a Non-BT Titan on the same track. I would love to see someone do the swap, just to make sure, but its too involved for me, and I haven't seen anything that makes me want to spend the money for it