Dana 60 with upgraded slant six

Dude, an 8 1/4 will do everything you want, has a billion parts available, was built since the dawn of time, and isn't so heavy.
Putting a Dana behind anything less than anything with a trans brake or a BB/Hemi is foolish.

ESPECIALLY in a street car. Ditch the unsprung weight and steer clear of more than you need.