Slant6 Exhaust Manifold Brass Washer

Believe it or not, I found one !
O.D. is 3/4 inch
Thickness is 1/4 inch
Now the fun part. The hole is tapered. Approximately 27/64 to 29/64
I have 9 NEW triangle washers and one USED brass washer.
The new triangle washers have the correct tapered hole. Nice.
You may find something to use for the other brass washer in a hardware and do some grinding on it to taper the hole yourself. It does not have to be exact.
Donnie
Thank you very much for the measurements and advice. I might see if I can get them made up at a machine shop. The curved edge might be tough. We’ll see. Thanks again. Rich