I would get a fatman frontend (mustang II style).with the 11" big brake setup, a 5.7 hemi with a 5 speed auto with a B body 8 3/4 rearend with 3.23 or 3.55 gears.
vintage air is a good unit but southern air makes some nice ones too.
the only issue is getting the wiring for the Hemi, I haven't done one yet and they look like they are expencive
, that should make a great daily driver or cross country car

I built a 37 dodge sedan for a friend years ago and I used the must II frontend and 8 3/4 rear and used a 360 2bbl/727 and that was a great cruiser car Ron....