1977-78 Topps Basketball variations- any info?

I was in a card shop about a month ago while I was out of town, and I was looking at some 1977-78 Topps basketball he had. I seem to remember them having the standard "dull" back that Topps cards from the 70s had, but every '77 card I've seen since has a bright glossy green back, and I haven't been able to find any others with the dull background. So now I'm thinking I'm confused and was looking at cards from another set. I was wondering if anybody had any info on the 77-78 Topps basketball set, and whether there were variations on the back.
Lee
Lee
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Lee