This is the body buck tag. I bet you found it on the core suport above3 the passengers headlight.
2F94Q545679 76F - 24D 622
3B AC PB DW
ST RM PW LHPAC
Now if I remember correctly...
Q=351C 4V cobra jet
545679=45679th built for 72
24D=I think maybe build date(this location is color on 71 & earlyer)
3B= color light blue
DW=white with black XR7 bucket seat int.
ST= sterieo radio(Any optional sterieo, 8 track am/fm ect.)
RM= remote mirror
LHPAC=look and see if its LHRAC=left hane race mirror
DE= I'm not sure I thought it was defoger but you wouldn't have one on a conv.
I am not 100% sure of all this but it is the best I can tell. Sounds like a nice car. Neal
Look at the drop in torque. It was also low compresion. I have had a 71 "M" and a 72 "Q" . the M would kick butt over the Q. And the 70 "M" has more power than the 71.
The info you gave us does not have the rear axle code. It would be on the door tag if it is still readable. You could also get under the cat and look for the tag on a not on the pumpkin. Don't brake it off it will leave some needed info behind. Neal.
oops, my fault. here this book i have for 72 Mustangs lists this.... the Q had 266 [email protected] and 301 lbs @ 3800. the R code 351 had 275 hp @ 6000 and 286 lbs @ 286. those are net ratings as well, and California spec engines. ( the footnotes said so ) running on regular gas of 91 ( ! regular ! ) octane.
I no longer have eather the 71 "M" or the 72 "Q". the only other engines I'm awair of in 71/72 cougars only had a 2V carb. I'm not saying the 72 Q is a slug, it was just detuned to meet emishions requirments. I have liked Clevlands for some time and have a mild 2V headed one in Badcatt. Hope you get it together so you can tromp some boe ties soon. Neal.
P.S. The "R" was no optioned in a Cougar in 72 like it should have been.