I just did all this, built a K-frame stand, took all out from the bottom etc. Check my threads. I really liked doing it this way instead of from the top (I lifted many engines from the top before, this was my first from the bottom). But I would only do it if I was gonna take the whole suspension apart, just an engine fix, I would still do it from the top. Mine went OK, my 2 problems were to get the T-bars out (passenger side was stuck) and then the K-frame bolts was really hard. I though I was gonna bend the frame at one point... so a day before, start preparing the bolts, use some rust spray on them, good if you can spray inside the frame on the threads so it can work itself in there over night. And possible use a torch.
I took mine out with no wheels on, just lowered the front of the car on the cart, then took the bolts out, hooked the engine hoist up to the car and lifted it up.