This appears to be the cheaper Chinese knock off of the Lockheed one also shown. The Chinese ones have a poor reputation but you might get lucky. Compared to the original Girling servo it's difficult to get a tidy installation with the Lockheed as the pipework comes out from the front rather than the back. You also have to install them at an angle. Look around on Google images for how others have installed these. If you post your email address, or pm me it, I'll send you a composite pic of a few different installs.