Yep, I dont know what the rear end ratio was (2.73?), but it was a TH400 (4 speeds are hard to find!), 400 engine. I can't vouch for the speedos accuracy either, but it was fast, and in that car it felt VERY fast because of the old ass suspension and basically dead KYB shocks. Front end with some head wind is not something that makes you feel comfortable, which is what held me against trying for more.
Now the Camaro while noisy at high speeds, is totally and absolutely stable at near 150 (Koni DA, 600# front 140-160# rear), haven't had the balls to go for more though, because if you do F up, your toast, and I'd rather not have that become reality! As time goes on I'll push it more and more though I'm sure, I love I5 for those road trips