Adding a Dana will not hurt handling or street manners.
These cars are all nose heavy in stock trim or anything close to it, and better balance improves handling far more than a small increase in overall weight will hurt it. If anything the Dana will improve F/R weight bias and may even lower the CG a smidge.
There’s a small increase in driveline losses, but that would hardly be noticeable, if noticeable at all, on the street.