front suspension question

[jr1966]

I am still working on this 69 GMC and have a problem, I think. I put the floor jack under the middle of the front crossmember and jack. As it comes up enough to try and clear the tires the right wheel stays pointed straight and the left starts toeing in like in a right turn and stays that way while up. The front is a later model with power steering and disc brakes and all new other pieces, A arms ,tie rods , idler arm.
Now is this normal or do I have something wrong ? I am new to this truck stuff.
Thanks, JR