You don't want them splayed out unless you move the front hangers to match. You want the sliders to be inline with the springs so there's no binding. You also don't want them all the way at the front like they are now, the eye should be about 2/3 of the way back in the slot. Per the info below, they say " 1/2" rearward of the center of the slot".
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The graphic does show the springs splayed out, BUT, you can't force that with just the sliders. You have to set the springs up at that angle, which means the fronts have to match. E-body and '71+ B body springs are splayed like that. Like everything with suspension, there are pros and cons to doing it that way. But on an A-body unless you change the fronts keep everything parallel.
Here are mine. They ended up a little further back than ideal when the springs finished settling out, but you can see they move forward more than they move back. Part of that is the zero arch springs on my car though.
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