Paul
I just received the 2 1/4 " od by 1 3/4  id and I check the dimension is undersized on the id and oversized on od so it means I do have some material left for machining and grinding.
I found a place in Daytona who can make treatments to the request hardness and annealing for $140 minimum charge and calculate by the weight

 
 
JEAN PRUDHOMME
 
                        

There is a lot of race car stuff built around Charlotte NC.

Here are some heat treat outfits.
Send them a Rhino rendering of the part you want heat treated.

Paul Lamar


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