I am trying to figure out what the points A & B represent in the frame diagram. I am assuming it is the leading and trailing edge of the K frame above the torsion bar center line but I am not sure. I attached the diagram.

Are they mentioned in text?
They are not ON the frame, but are a point inside the rails and below them....

I took a class in blueprint reading and dimensioning and I cant figure it out! It MAY be the torsion bar locations (?) but I dont know if they are about that distance apart. 33.92 is the bolt center distance for the K member, what I really dont get is the lower drawing dimension .70 below frame centerline and then the 1.74 below frame CL measurement that looks to be a parallel line (torsion bar under Frame CL?) Do the torsion bars rise toward the front? Looks too high to me.

are they the c/l location for the lower control arm pin location? which should be in line with the LCA strut rod hole at the front of the frame? Just throwing stuff out there.

Those are the Torsion bar centerlines!(Front Spring)
Brad