1969XR7Vert,
Will have to do some research. Could very well be true. On the other post MaqCats posted;
MagCats
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Re: 69-73 AC Evaporator Thermostat
There were at least 3 different versions for 69-70 alone. One Before February 25, 1969, One after Feb 25 and before October 4, 1969, then one after Oct 4, 1969. They might have Internal differences. Originals have these dates next to the Connecting Pins for verification.
http://stores.ebay.com/MagMustangs
I checked out his ebay store and he has one of the three different dated ones for sale <TABLE class=sp1 summary="Other item info" cellPadding=3><TBODY><TR><TD class=inf_lab vAlign=top width="1%" align=left>Item number:</TD><TD vAlign=top>150531966454</TD></TR></TBODY></TABLE>
Late1969-Early1970 Ford Mustang, Fastback, Coupe, Convertible, GT, Shelby, Mach 1, Grande, Mercury Cougar, Standard, XR7, Eliminator... For Cars Built After February 15, 1969 and Before October 4th, 1969... AIR CONDITIONING EVAPORATOR TEMPERATURE CONTROL DE-ICING SWITCH With Sensor Rod... This is an ORIGINAL FORD PART. Removed from an Early 1970 Mustang with A/C. Stamped [FOMOCO] C9ZA-19618-A 2-15-69 Cutler Hammer.. Has an Ink stamp of '3N57' . ... The Switch is in Excellent Condition. NO RUST..TESTED AND WORKS. The Switch looks Nice. Sensor Rod is Great . Electrical Connections are Nice.. Overall, a Great, Working Original A/C Switch.
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</TD></TR><TR><TD class=ipics-cell><FORM method=post name=ssFrm action=http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?VISuperSize&item=150531966454 target=ssFrmWin><INPUT value=0 type=hidden name=ssr><INPUT value=0#http://i.ebayimg.com/20#!CFGtJ5QBmk~$(KGrHqIOKo8E0UePRT07BNUD5Q0p4!~~_14.JPG#!CFGtJ5QBmk~$(KGrHqIOKo8E0UePRT07BNUD5Q0p4!~~_12.JPG|1#http://i.ebayimg.com/09#!CFGtStQ!Wk~$(KGrHqEOKjEE0f2CblUFBNUD5kdHPw~~_14.JPG#!CFGtStQ!Wk~$(KGrHqEOKjEE0f2CblUFBNUD5kdHPw~~_12.JPG|2#http://i.ebayimg.com/15#!CFGtbhw!mk~$(KGrHqQOKokE0fwI--jjBNUD53ybEw~~_14.JPG#!CFGtbhw!mk~$(KGrHqQOKokE0fwI--jjBNUD53ybEw~~_12.JPG|3#http://i.ebayimg.com/08#!CFGtmDQEGk~$(KGrHqMOKp!E0UqF(K,iBNUD6ObsF!~~_14.JPG#!CFGtmDQEGk~$(KGrHqMOKp!E0UqF(K,iBNUD6ObsF!~~_12.JPG|4#http://i.ebayimg.com/18#!CFGtvnQBGk~$(KGrHqMOKpoE0U8DDwSGBNUD6jhH+w~~_14.JPG#!CFGtvnQBGk~$(KGrHqMOKpoE0U8DDwSGBNUD6jhH+w~~_12.JPG|5#http://i.ebayimg.com/03#!CFGtyZ!!Wk~$(KGrHqUOKjME0hhRUneSBNUD6p3GEw~~_14.JPG#!CFGtyZ!!Wk~$(KGrHqUOKjME0hhRUneSBNUD6p3GEw~~_12.JPG|6#http://i.ebayimg.com/08#!CFGt48wBGk~$(KGrHqQOKm8Ez39zRQDRBNUD645cbQ~~_14.JPG#!CFGt48wBGk~$(KGrHqQOKm8Ez39zRQDRBNUD645cbQ~~_12.JPG|7#http://i.ebayimg.com/14#!CFGt+!gBmk~$(KGrHqMOKowE0fm6Y-ZGBNUD7GmMc!~~_14.JPG#!CFGt+!gBmk~$(KGrHqMOKowE0fm6Y-ZGBNUD7GmMc!~~_12.JPG type=hidden name=iurls><INPUT value=7 type=hidden name=dtid><INPUT value=1 type=hidden name=vs><INPUT value=0 type=hidden name=sh><INPUT value="1969 1970 Mustang Mach1 Cougar Xr7 AC EVAPORATOR SWITCH" type=hidden name=title></FORM><TABLE border=0 cellSpacing=0 cellPadding=0><TBODY><TR><TD class=vs_w-a><CENTER>
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I see the two screws ( in, out) anyway there's an extra for you if you need it.