Longtube haeder and Prochamber bolt pattern

[silverlx5.0]

I have searched but not found an answer does anyone know if the MAC prochamber for Longtubes has a 3 bolt pattern to match the lontubes collector 3 bolt pattern? I know the shorty headers have a two bolt pattern. Thanks in advance.

 

[silverlx5.0]

My longtubes are 3 bolt pattern if the prochamber is 2 how do I install?

 

[89MustangGX]

I believe Mac L/T's are also 2-bolt. You will have to fab something up.