Any drawback to keeping the drum spindles on my 66 Valiant?

I talked to Wilwood after seeing this Hot Rod fit-up to a 65 Coronet.
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Slightly different hub dimension (3.10" vs 3.24") but still an interference fit to the 2 7/8" center bore wheel. So I asked about spacing out 0.20". With the hub base radius of 0.38" and taper it might be possible. Anybody try this?