yes it will screw straight in. i've gone from an auto ke70 to t50 then w55 with no issues it even changed sides at some point.
I did buy a new non genuine ke70 one from ebay and the tab stuck out a tad too much so i filed it down a hair until it fit.
If your speedo is out you can swap the speedo gears in the box if its not out by much.
I went from 3.9:1 to 4.556:1 so i had to get a speedo correcter with the right ratio.