67 cuda upgrade... what do you guys suggest?

I think you better ask your Wife what she wants.

Mine would never be able to drive the three on the tree let alone a floor shift manual.

V-8's scare the crap out of her, and she is petrified to ride in my car......she says it's like riding a fire breathing dragon.
She liked my /6 three on the tree dart swinger special though, but she could not drive it nor would she if given the chance.

I'm trying to talk her into a new panther pink challenger.....she saw a pic and really liked it. LOL.