Should I get my car running driving as is OR

Well bare minimum is

clean/regasket/inspect/paint the 400-better intake/carb/wires/plugs/fuel pump
Rebuild the 727- buy input yoke, and floor shifter, IF I used the stock cam in the 400 I could use the converter that is in the trans I have (stock)- probably pull the pan/VB and inspect it, maybe it don't need rebuilt..
Have the 8 3/4 setup- bolt in ready
FULL exhaust minus mufflers (have 3" Dynomax's from my stang)
Have driveshaft cut/ rebalanced
New headliner/ repaint dash/ have windshield put in
Fiberglass hood w/ 6 pack scoop (or rock no hood but I'm not a big fan of that look)
All new stock style fuel system- 3/8" feed line
install SFC's and drive shaft loop (already have the loop left over the stang)