I'm having the same problem I've seen with the pressed in rocker arm studs! I ordered some Pioneer #850001 from Jeg's but the didn't have much application info. has anyone used these or Speedway 577RM348 Chromoly Threaded Screw-In Rocker Arm Studs, 3/8", Set of 16? Problem is taking the heads back off IS NOT an option for me now!!! the Techs were gone for the day at speedway. Just concerned about the pioneer length. It's for a 350 chevy 75 Camaro. Thanks for your input! Tried looking for dorman #693-006 they are discontinued. Couldn't find them anywhere!