Hello. It's been nearly 2 months since I put the 5 speed in my Nova with the 194. I actually LOST mileage. I went down from roughly 13mpg in the city to 11. I don't have the numbers but highway was definitely less. I went with a T5 from an '85 Camaro 4cyl. My rear gears are 3:36, tires are 14/70s. I could have put a Saginaw 4 speed in for a lot less.
