Never heard of anything done by him, but then I have a much earlier rifle than yours with a Johnson Automatics barrel on it (by the guy who brought us the Johnson light machinegun).
Quick search shows Arthur Shivell was a gunsmith in Saugus, CA maybe up thru the 50's.
“
The Savage 99 Pocket Reference”.
All models and variations of 1895’s, 1899’s and 99’s covered.
Also dates, checkering, engraving.. Find at
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