It's my understanding that the majority of 4.3L headers fit GM engines, as long as it specificly says that they are designed for GM or Chevy 4.3L engines. Usually, the best that you will find are whats listed as "block huggers" which in your situation, may be exactly what you want since you're looking to save space under the hood. Your not likely to find any shortie style headers for a 4.3 that are resonably priced.