Those guys had big balls. I can't imagine the Navy of today giving them the freedom to mod the a/c and make the mission work.
This guy's site is a good one that has quite a bit on them.
http://www.vpnavy.org/vo67_history.htmlThis issue of Naval Aviation News had a good article (and you get a bonus Grampa Pettibone)
http://www.history.navy.mil/nan/backissues/1980s/1981/jul81.pdf (The VN Special ops section starts on page 30)