Driveshaft Lengths 67-69 A body Baracuda

Yep my 2 driveshafts i have are one from a 67 slant sux 3 on the tree 7.25 with a 2.75" dia. tube.

And one from a 74 dart 318, A904, 7.25. With a 3.25" dia. tube.

I am wanting to shorten the darts 3.25" tube thinking it might be stronger than the 2.75" tube from the barracudas original slanty drivetrain. Am i thinking along the right lines. Bigger is better?

Ultimately the driveline in it will be 410 stroker, A833, 8.75 with 3.73s.