If you still have the old one mounted in the tranny: By hand slightly pull out and push it back in a few times to get the feel.
Pull off the plate, remove the old one and place the new one in place, put the plate back on. Play with the shims till you get the same feel.
Also, anytime you remove the front plate the tranny should be standing straight up and down, if you do it laying down you risk things falling out of place while the cover is off.