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

Super Sleeper said
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?

With the taper that the Wilwoods have that might work. But keep in mind that’s the same as reducing the backspace on the wheel, it will limit your tire width. Basically it would make the cop wheels a 15x7” with a 4” backspace instead of 4.25”, which would mean you’d be maxed out with a 215.