I bought my Delphi 50's from Houston Performance for $475, they are a matched/flowed set of 8 that are dropped shipped from Precision Turbo for Houston. I think Precision wanted like $530!! I looked for a while and wanted a matched set, and that was the best price I could find. You can find un-matched sets for $400/8. Good Luck!!
Dallas Mustang had the best prices when I got mine. I don't think you will see a difference as long as they flow what they are supposed to. I believe mine are the holley units (DM). I forget the exact number but I think I paid $450.
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