Date code on stock exhaust manifold

Date codes on other cars can vary for multiple reasons, so their is not a factual answer to your question since the date is illegible.
Well let me explain it this way, if someone had an original AAR built in April of 70 and it was only missing the exhaust manifolds and they purchased replacements with a November 69 date would that be considered an appropriate date code correct exhaust manifold for that car?