Yes it will,
all 68-72 GM A-Body's use the same windsheild, except they didn't come out with the antenna until 70. All you need is the cable that goes from the radio to the cowl. it's a short cable, and that plugs into a connector at the base of the windshield.
Mitchell, this was covered not long ago...I asked the same question. Yes, it will fit, and apparently windshields with embedded antenna are easily available. I think(?)someone also mentioned that the connector is available from Year One, or one of the other suppliers.
Been there, Done that. Buy the 70 windsheild and buy the connector from Year One. You will need to drill a hole for the connector. Look at a 70 to see exactly where the connector goes and start drilling.
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