The 'X' is for the 455 HO.
There were around 194 automatic 455 HO Formulas made in 1972.
So it could be a Formula, unless you know the car's VIN which would have the 'V' for a TA or 'U' for a Formula?
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John Wallace - johnta1
Pontiac Power RULES !!!
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Winner of Top Class at Pontiac Nationals, 2004 Cordova
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KRE's MR-1 - 1st 5 second Pontiac block ever!
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