best compression ratio street build?

You won't get as much mileage with an auto as I do with the manual likely drop down to the 14 mpg around town and you won't likely break 20 on the hiway with the 904 and 3.23 gears.

If the car is going to be a daily driver for college I would stay with what ever is currently in the car and save the 360 for when you don't need to rely on it as daily transportation. The slant or 318 that is in the car will do much better.