couple of questions
 

This is my first rebuild and i was wanting to make sure this is my timing mark.

Also are all narrow frame subframes interchangeable, more specificly a 105 subframe to a 100

http://img.photobucket.com/albums/v4...t/IMG_0286.jpg

Yep, that's the timing mark.

You can bolt a NF QA subframe to a 100, but I'm not sure if the bolt-on subframe will work on a QA tractor...I can't remember if the holes and nuts are in the frame for it.

Nope!

Not all subframes are created equil.

Subframes are an odditity. This one will work on that tractor with this deck but not on this other tractor with the same deck and vice-versa.

Ya gotta look at em.

where bouts in NC?
 

Im close to Winston salem

Climax, just south of Greensboro