Why cancel your order, just wait it out on the 2012 and negotiate hard, I picked mine up for nearly 6k below msrp, this way when you trade it in towards a Cuda whenever it does appear in showrooms you will not get hurt that bad, and you get to enjoy a 470/470 392 in the mean time
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2019 GT350 RR
2013 Boss Mustang
2012 SRT Challenger 392 auto 12:40s 112 stock
2012 Ford Mustang 5.0. Brembo, 3:73s
2010 SS, LS3, Cammed, LTs, 12:20s
2004 Redfire Cobra, Pullied & Tuned
1986 GT, Ed Curtis 347ci, 11:20s motor. 10:30s 100-hp shot