I believe that all the stock rims had six clip holes. The Chevies used three larger clips and the GMCs used six small clips. Both styles are available.
FYI - I had six original AD rims for my '54. I had 2 GMCs and 2 Chevies blasted and repainted - for some dumb reason I was reluctant to blast the original paint from the best 2 rims. Anyway, both sets had the original clips left on. I bought GM repro hubcaps for my 54 and they fit on both the GMC and Chevy clips. You should not have any trouble.
