[William]

I'm fairly certain U16 did not exist as an option prior to January '69 as it is listed as a change in the 1-2-69 rev of dealer ordering info. The first and second orders Yenko placed were prior to that; 202xxx body numbers were ordered early Nov '68; 219xxx ordered later that month.

The famous COPO service letter states that 9737 "Incorporates a Fuel Gauge Assembly and four related service replacement items applicable to the Camaro 12437 Series vehicles only."

There is a chart that notes 9737 is “Used as a Vehicle Combination [underlined] with COPO option 9560/9561.”