Track is best to see where you stand, Trap speed doesn't lie.
On a mustang dyno, parasitics info entered for the car can skew numbers lower or higher (weight etc.). You can have two mustang dynos that spit out completely different numbers.
I believe you mentioned you have heads in your other thread? No reason the car shouldn't do high 11xmph if not 120mph+ at the track.
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2000 ws6
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