Porterbuilt parts were used to convert Project Larry's 4x4 blazer to 2wd.
Delmo used a Porterbuilt
4-link rear suspension and step notch to make it work with the 4x4's "straight" rear frame rails.
Give Porerbuilt a call.
They have the conversion figured out now.
Delmo's thread:
http://67-72chevytrucks.com/vboard/s...d.php?t=593323