Apparently they're real pigs to do. I was discussing this with Chris(quicksilver) and he thinks you may need to drop the subframe slightly to do it properly.
I thought I had done a how to on this, but I must have forgotten to.
Just for you, here is a new how to. Hope it helps, although mine was done with the engine and subframe out, so you might want to employ someone with very small hands, or drop the subframe a bit.