Using mustang rotors for 4.5" bc

Hi Guys, I did machine the Mustang rotors (Raybestos 6004R) and worked great for my dart. There were comments about not finding the rear seal. Here are two options:
SKF seals SKF
Timken seals TimkenĀ® NationalĀ® 8121S 8000 Multi-Lip Oil Seal With Loaded Spring, 1.73 in ID x 2.34 in OD x 0.47 in W, Polyacrylate Lip, 70 to 75 Durometer | Source Atlantic
I measured the seal surfaces and confirmed they are correct 2.34" outside dia, 1.734" inside dia, .47" thick

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what are the final machining specs you used ?