87 fc na FPR to Fuel Rail size
 

Hey everyone I'm having difficulty finding out the specs of the outside diameter of the Fuel Pressure Regulators inlet where the o-ring goes. This is on an 87 fc na.

I am doing new stainless steel braided hoses But was having a hard time on the fpr and what to do with it since I want an aftermarket fpr. I found a thread on here where someone suggested some adapters easily found on eBay but not the web. This will eliminate OEM FPR so I can attach -AN fittings but here is the issue...

As I did more searching I found many of these but they all say fd3s / miata na, nb, nc / and even subaru. I asked one seller the OD and he said 11mm at the inlet but he is not familiar with fc na system. Does anyone know if the fc is the same 11mm as an fd, mx5 n subaru?