408 Stroker Short Block Details: Blueprint Engines

I bought a blueprint stroker 408 base about 8 years or so ago and have had great luck so far with about 2000 miles plenty of power and the customer service was helpful. Recently I bought a 273 4 barrel engine from a friend who had a local supposed reputable machine shop build it and within 50 miles had oil in my radiator so I fixed that with new head gasket. Then 100 miles later started missing real bad. Found out had broken valve springs. Sometimes you win sometimes you lose. Short block looks nice to me. Dustin