wide ride install question

[tlbob]

Ok guys I'm right in the middle of installing my wide ride and have a question i am hoping someone has installed this type of front end i know a few have through my searching for the answer. so when i use a plumb bob and straight
edge to find my axle center line i came up 3/4 of an inch behind the 1/2 hole in the top of the frame now in the instructions they say this half inch hole is the center line so? and then for the install the say to move the center line forward 3/16ths is that from my mark or from the referenced 1/2 hole im thinking I may have to just tack it in re mount the sheet metal and see. I was just hoping someone could chime in?