Yes. The bench adjusts very easily. You can incline the bench at 4 different angles, then there is the 180 degree/flat, and lastly a slight decline. I use decline for my dumbbell chest presses.

Yes. A couple of different angles for incline, 180 degress, and then decline.

you can call the manufacturer at 800-999-3756

Couldn't tell you the exact dimensions of the rack but I'm 6'1" and at the highest it will go; it's perfect.

No, not really! The bench can be inclined and pushed back to take up less room or moved to some other location, but the weight frame itself still takes up about a 6'x3' wide space. If you leave the bench inclined and in position it sticks out another 4'(ish) where the bench is. Hope that helps.

I'm a shorter person-5'3". I use it for pullups and chinups. I just bend me knees and pullup or chinup and it works just fine. I don't know the exact height.

Box is pretty heavy-128 Lbs. Wal-mart was helpful bringing it out to the car for me. One piece of advice-build it where you plan to use it! I got the box in the front door, opened it right there, and moved the pieces one by one to where I planed on using it. It was worth the effort.

Yes it does and it is pretty good too.

I also am 6' and squat comfortably. The supports work well for seated over head press( I sit right on the bench) or you can leave them up as you would for squats, and do them standing. I alternate and both work great. As for the preacher, there is no problem getting full extention. And the bar attachment that came with it is probably the best for isolation that I've used

Yes, place heavier weights on the leg attechment and put the bench in a decline position and you will work out your abs.