The kit I looked at said it will not work with factory lockers. Not sure why but as the manufacturer they should be knowledgeable about that. The HP/TQ isn't anything compared to today but when you're talking about then it is a good bit. This is all original and the only changes were the spring...

I have a 73' LB single cab with the 360 and manual shift. It currently has the coil spring separator to force the springs apart for a lift running Q tires which are around a 36"x15. I am in the process of building this as a brush truck for use in the fire department. I have looked into doing a...