i have all 3 differant rockers and never had a problem and i use my fe cars i think you have a problem like wrong push rod lenth .all rockers will go much more than 500 miles.
after reading the thread good i can say your eng. builder is not very bright but i would bet the holes for the push rods in your intake are to small it is a very common problem with moderate lift cams and new intakes i dont like eng. builders that tot there own horn there is always one that will make you look stupid .
