Having owned a 65' Mustang 4 sp. 289, I figured the Cobra had 60% more HP the way I built it, and a few hundred pounds lighter. So I had a hunch acceleration would be huge but I forgot about gearing (running 3.55:1). The launch to 60mph is incredible!
What I wasn't prepared for was how much attention this thing gets. It's a little different when you're the one standing on the sidewalk, watching one go by, but you never really pay attention to the cars that were around it before it takes off. Now from the drivers point of view, you see more eyes, smiles and LOADS of respect from other drivers that let you go FIRST even though they have the right of way.
Summary: it is more than what I bargined for and I'm happy.