Trans tunnel space

I seem to have read, that the 1967 A-body trans tunnel was smaller than the 1968 & up A-bodies.

Any truth to that?

My '67 Barracuda is filled up with a 904 & no room for a trans shield or blanket.

The '71 Demon has a lot of room, my friends 1968 Barracuda has a shield on a 727.