This thread has a guy who sectioned the from cross member. Moving it forward too much? See post #22:
http://67-72chevytrucks.com/vboard/s...d.php?t=464574
Here is a page:
http://www.captkaoscustoms.com/chopcross.html
I found this looking at the FAQ page:
http://67-72chevytrucks.com/vboard/s...d.php?t=543729