Does anyone have the dimensions for the flange on the Exhaust Manafold for the 4.2 S/C


I expect my new 100cel cats to arrive this week or early next week.
so I am preparing to install them
I have made a pair of bungs for the 4 sensors from stainless bar stock but I will need to make a flange on the milling machine

I also have a selection of seamless wall stainless tube (straight and bent) ready to cut and tig weld it up
I can make the flange once I have the cats off but I'd like to get ahead of the game and make them before the weekend

So if anyone has the S/C flange dimensions it would be a great help

Cheers
34by151