Should be more streetable because of the Fuel Injection rather than carb. Plus, i will be working mornings soon, and starting the carb will be a little more than irritating lol. As for gas mileage, it should be slightly better, but at the end of the day i still have a TH350 with a decent stall and 3.90 rear gears. I don't plan on seeing anything over 19mpg on the street. Probably will be more like 15 with the LT1. I'm hoping that with a good tune and a 100 shot that i should be able to run a 7.6-7.9 in the 1/8 in my Z. And, since its out of a camaro, it already has aluminum heads, a light cam, roller rockers, and mild headwork, so i should save some weight upfront.
Plus, since its fuel injected and out of a 96, i might even be able to get it Bar'd. I am going to have to call and see.