Poly Locs or Mag Mounts?

When you get to shimming, you will need to loosen all the bolts on both sides. I found, that by jacking on the oilpan I could actually raise one side while simultaneously lowering the otherside, kinda spinning the motor around it's crank axis. Then some shims. Then tighten it up before lowering the jack.
The carb ended up a hair off kilter, but that was the least of it's worries.