1966 Barracuda Speeding Ticket

Hello fokes,
I need some help. I just got a speeding ticket, the cop claims i was going 75mph. I claimed i was going 45mph.

Car: 1966 Barracuda, 318 (mild cam, 650cfm carb, electronic igition, 2.85 gears, bald tires, basiclly stock except for the cam & carb)

Conditions: dry, concrete road, smooth (excellent day to hook up the rubber)

Here's what happened:
I turned right on the main road off a side road, took note of the conditions, and felt the urge to "open it up", so i matted the pedal, accelerated hard, but not hard enough to break traction of my bald assed tires. in about 1/8 of a mile, i saw a motorcycle cop: i took note my speed was 60mph, let off gas, pressed the brake to slow down to 45 (quickly), i claimed 45mph because of this procedure.

Question 1: would my vehicle be capable of 75mph in an 1/8 mile considing my hole-shot was out of a right hand turn?

I want to start there because i've been down this argument before in traffic court, and the cop has the advange. the burden of proof is on me to show my old Cuda can't do that speed.

maybe if someone has a desktop dyno we can plug in some numbers, then i can cross that with a little "Myth Busters" trial runs.