Either Trickflow or Edelbrock RPM heads would be a good choice for a street thumper. You can't go wrong with either one. I had a 355 a few years ago and I liked the CompCams Magnum 270 cam I had in it. If you have a roller block, I would recommend the roller version of the Magnum 270. Otherwise, go with the flat tappet cam. In my opinion, the cost of a retrofit hydraulic roller is not worth it. But, hey . . . it's your checkbook!