64 C10 - gets a T5 transmission

[akqj9]

I have a 1964 C10 long bed with a straight 6 and 3 on the tree. I pulled the 3 speed and am trying to get my new T5 trans to slide in but it won't go the last 3 inches. It is hard to push up the back and push forward at the same time. I don't have a lift. I think I need to lift the rear of the trans and get it more straight since I think it is hanging up on the clutch fingers.

Any tips on making it slide in easier? Tomorrow I was going to try a floor jack to lift the rear while I push. The last time I installed a trans I had to use C clamps or long bolts to crank it in the last few inches.

I had to cut the 4 rivets that held the cross member so I could remove it because the new trans is 5 inches longer. I will bolt it back in once the trans goes in.