I agree there, and I just drove a stock 5.0 with an intake and exhaust and it is surprising how slow it felt. After that I was in mine and it felt good to have to peal it through all of second. The deal with the LT1s is even with junk gears the are very good cars for launching. They come out hard and make up for the gearing. Toss in a set of 3.42s and some DRs and if the rear lasts the car should be in the mid 1.7 60's all day. I just know that an average LT1 is a low 14s high 13s car, whereas an average fox (bone stockers) is a mid to higher 14s car. Take into account that E cam might even be hurting, and the cam in the Fbody is just waking it up, and you have a decent gap expanded by up to half a second more.
Oh well, I dont own an LT1, or a stock 5.0 anymore. Go race and let us know the outcome.