Sounds like you are running too lean. Give the FPR a few turns and try that out. I have close to the same combo, and when I first drove it, my autometer gauge was off and I was running around 24 fuel pressure. Needless to say it popped, backfired, and ran like garbage. It runs great now that I figured out the problem and upped the fuel pressure to 44. I also have the TFS cam and have not had problems with it.
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