I have it written down somewhere what I ended up with, but essentially I widened the gap a couple of notches above stock. I tried a couple of different gaps before I got it. My engine is the 200 so it'll probably be different for a V8 car. All engines have their own personality anyway so just widen them a little at a time and see what works best for you.
Sorry for the vague answer
------------------
66 Tahoe Turquoise Coupe
Laser Red 96GT Ragtop
Both are slow but easy on the eyes!