Welcome to the Harrison stable Murray
I had the same problem with mine........i couldn't do much with the whole cradle angle as with my earlier built car, #38, there was clearance issues with it and the chassis. Incidently I removed the rubber/goop filled Nissan mounts and replaced them with Nolathane.
As Warren did, I bought new longer bolts and packed the front of the diff up with spacers to achieve around 3 degrees. I would have lifted the T56 a little but, once again, was confined by the clearance in the trans tunnel. After lots of fiddling with the dremmel I've only got a couple of mm gap
Greg