Exhaust/Header Flange dimensions
 

Hello all

Can anyone help me out with the dimensions/measurements of a 13B series 4 TII header flange? IE the spacing between exhaust ports and spacing of bolt holes. I'm going to be making another header and want to have a new flange cut at work so these measurements would be helpful. Better yet a dwg or dxf :) .

Anyways any help would be greatly appreciated.