I will be using a modified 67-72 transmission crossmember in my 65 Dart with a 42RH transmissionBut then, you can fit anything anywhere with a grinder and a mig welder.
My 63 Belvedere was a 3 on the tree. Now a 904 using the stock manual trans cross member with a A body mount pre 73.you can fit anything anywhere with a grinder and a mig welder.