Ok after much beating and cutting on a really nice floor pan
I can gain a 1" shim between the tranny mount and cross member, this raised the tail shaft 1-1/4". The tail shaft is now only about 1/8" from hitting the the crossmember support that is under the floor. If I cut out that support I could gain maybe another 1/2"
But what I did gain only gained me about 1/2 deg of angle, I am now at 3-1/2 deg down instead of 4 deg. So I am never going to get to 1 deg unless I stick the enitre tranny up through the floor. I don't see how any more can be taken off the tranny in this area to gain me anything either, so I think I am at the max I can get.
But reguarless isn't the real important thing the relation of tranny to rear end. So if I would get the rear end at 0 degs it would be the best case?