I have my car on jacks right now. Took off the front strut and coil and am trying to pout in the Tein Flex. I got it hooked up and everything, but it doesnt match the specs for point a to point from the manual. Should I disregard their setup length and just fit it to my car?

The overall length of the stock strut was around 21 1/2 I belive. So to lower it 2 inches I just subtract 2" from the overall length and thats it? Any tech help please as I wanna get this finished. Thnx