I was just flipping through my massive file of Mustang pics and i got a little sentimental and decided WTF why not start a thread about what i think could be the baddest Mustang ever made! The one and only '69 Boss 429!
my grandpa took me for a ride in one when i was 14 or so...
one of the coolest and most memorable moments of my life so far...
Sure there are more powerful Mustangs today but not from a good old all motor big block 
btw 69 mach 1 is cooler.
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Mach's are a dime a dozen compared to any Boss. Mach's were built on the Ford assembly line along with all the other Stangs. Boss 9's were hand built by Car Craft. Mach's had stock Ford powerplants. Boss 9's ran NASCAR hemi-head big blocks. The Boss 429 is undoubtedly the baddest factory Mustang ever offered. All engine. A real man's Mustang.

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Mach's are a dime a dozen compared to any Boss.
and that is what makes them better. the avg working man can find and resto one.