My 69 was same way with 2 engine
when I bought it the engine was sitting on cross member
I didn’t think much of because of the age of car
When I put the new engine in with new mounts it did the same
I did some looking and found that this common
now I was told between years and aftermarket oil pans the way they were shaped changed slightly
You can try different brands I even tried mity mounts they didn’t work
I used the shims 1/4 thick worked for me I also have aftermarket chrome oil pan now pan sits above crossmember
Butler Performance has a nice selection

Yes the engine dose have to almost come out you can try to lift engine up and try to get it out past the main bearing caps and below the trans
But some engine you just don’t have the room to do this
Good luck with car

Butler performance has a 1 peice oil pan gasket which is metal coverd in lined rubber
Check their web site out