2:91 or 3:55?

I think this is a second gear question. With an A500:
In the city;
Almost anytime you want to accelerate, the KD will be into First gear. So if this is currently working for you, then leave it alone.
One of the nicest second gears I have used is a 6.82 in a manual trans. The TC would make this with a 6.50 ratio, and with a 1.54 second, this would take a 4.22 rear gear. The closer you get to that, the more fun you are gonna have.
Your 3.55s and 1.54second make 5.50, which is a lil shy, but your torquey cam will likely get it done.
But I gotta say; KD into first at 30mph with 3.55s will get you very close to peak torque (I get about 3800) and that is gonna light up the tires at WOT.
And the final drive is still 3.55x.69=2.45, a great cruiser gear.
So that leaves on the hiway, and specifically, passing.
At 60 dropping into second with 3.55s will get you 4300, and you can hold that to about peak power with a [email protected] cam;at 5000=70, not the best but it works. You should be able to hold that to 5500@77mph
The alternative 2.91s makes KD into second at 60 to be 3500, at or near peak torque with a [email protected] cam; giving you plenty of headroom. Peak power comes around 5000=85 mph. Heckuva passing gear.