Does anyone know the link for the business in Australia where they modify 13B rotor housings to be used in a 12A?Thanks in advance.

 

Don't recall who originally posted that idea, but I imagine most any decent machine shop that planes heads could do it. If you have a junk 13B housing, they could make a practice run.

 

What someone really needs to do is make available 12A intake manifolds with the FC bolt pattern. Then you can churn out cheap modified housings without the need for coolant seal grooves because the FC side plates have the grooves. All the machine shop would need to do after grinding off the required 5mm from each side is a simple dowel pin o-ring land and you're done. No need for expensive CNC coolant seal grooving IF a cheap 6 port or T2 bolt pattern (same thing, but the runners are different, obviously) 12A manifold is made available. Do you see where I'm going with this?