I'm not arguing with any owners here,or Jeff D.,but I have yet to see the #2003 distributor documented anywhere in any parts books or similar materials from any time period.
It does sound like it came on VERY late 1969 Z/28's ONLY,and an 11A would be exactly that,but I have that P&A 30M parts book dated 9/69 and it does not mention the #1112003 in it anywhere.
Also that particular P&A 30M was for 1970 vehicles only and it shows #1112001 & 2 for applications completely different then this one mentioned here.
I would like to know if besides actual owners cars,if anyone has any old GM printed materials shedding more detailed info about #1112003 distributor.
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CROWN EM!