Housing changes in-around mid-late 71 to the flanged style from the banjo style. An original 72 should most likely be the flanged style housing.
1969 is the same style, but the cap may be the metal eared type. Most, but maybe not all (jury is still out) 70 caps are the 9 bump style without the "do not overfill" text.
These pumps got changed out so much that its tough finding a truly original set of data points on some of this.
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70Z28 04B Norwood Forest Green-white Stripes Black DeLuxe Interior
Owned since 1978 - First Car
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