[70post]

It's the lack of the "Service With Delco Parts" lettering that makes it "incorrect". Both covers have the J1703 wording.

I think these "General Motors Delco Moraine" covers came along after 1972 but don't know 100%.

I pulled 5 original Delco disc brake (w/bleeders) masters w/likely original lids (from 70-72 Abody cars...EB and BE stampings on the nose) at a local salvage place that was closing up this winter. None had the "General Motors Delco Moraine" covers....all had the "Service With Delco Parts" wording.

Still, the OP's cover sure is a nice substitute to have while looking for the earlier cover...much cooler/better than any repro cover.