Chamberline Garage door opener install

I am installing a chamberlin opener and have question. It is not clear on the video or instruction manual in regards to how far the attaching wall is from the door.

In my case you can see the wall is about 6 inches from the door. If I put a 2x4 on the wall to attach the bracket will it bring the track far enough forward to allow it to correctly open the door? Or does it not really matter?

I am going to have to put the 2x4 there anyway and attach it to the wall framing so the bracket has a solid attachment but do I need to come out further or will that be enough or it doesn't matter?

Any help appreciated as I do not want this project to take longer than it has to.
Thanks in advance for your help.

Attachment 73665

 

It doesn't matter. The J bar attachment has adjustment between the opener rail and the door.

 

an inch and a half is not going to matter, make sure to screw the 2x4 and not use nails... they won't hold. The bottom of your 2x4 should be about 13 inches above the door. Also make sure you brace the top section with a strut or angle iron... all the way across the top.