428 and Patrick,
OK, to quote Pat- ""I think the two most common mistakes with a new Cobra that I have seen over the years are:  1) Learning about lift-throttle oversteer the hard way; and 2)  Showing off with a cool burn-out and then losing control of the car.

"" 
Good advice, I would add ONE that almost got me. 
I think the short wheel base makes the car more unstable on up/down undulations in the road. A "dip" or "hump" that I was barely aware of driving my 67' Corvette was an opportunity to go "fly" in the much shorter wheelbase Cobra. Add a passenger for ballast and it was "off to the THRILLS SHOW"!
OK, full throttle acceleration over the otherwise "unremarkable dip" resulted in the Cobra rear end in a full "squat" and front end "pitching" up...enough to toss us back/forth a little...I inadvertently got off/on again on the accelerator...passenger thought it was great fun...I realized I had almost lost the car as traction broke and the car fish-tailed a bit.
My friend with a race-ready 63' 289" smiled at the story..."they sorta ride like a "buck board" don't ya' think"?
Have fun, take your time, r&r all the bolts and especially the knock-offs...I had NO idea how firmly they had to be whacked with the lead hammer...NOT tapped...WHACKED. I almost lost one. 
And, always, be sure to "check your 6"  before you get on it... 
Oh, 428 your car is beautiful, like the attention to stock details, no hood scoop...and the color is a favorite of mine...(after maroon).
Since you went to all "straight slot" screws...YOU don't need to carry a "phillips head" screw driver in your tool kit...just spare change...dimes work great on the SPAX shocks.
Pete