Okay. I'm sorry about that. Here is the information I have about the rear fender brace for the back of the fender of the 1946 Chevy Truck.

From web site - : https://www.classicpartsusa.com/product/MS108_1946/1946_Truck_Parts_Fender_Items

1946 Fender brace, rear
1946 Fender brace, rear ITEM NUMBER: MS108_1946
Description: Fender brace, rear, lower, as original in 1940-41 but will fit 1942-1946, works for Chevy or GMC trucks, for 1946

I hope this helps.

Thanks for your response.
James