Try a #5 Byron with the Rossi offset header. Use the BVM header adapter on the engine. Also use the BVM pipe retainer on the Rossi header. Use a white Rossi Pipe coupler and BVM hot seals between the pipe adapter and header.

Complicated but very reliable!

Let me know if you need more info.
Good luck with whatever route you choose! The F-16 is a great plane! Make sure your tail is in satisfactory condition! Do a search to find all the different mods.

Dustin