5.0 EFI INTO 5.0 Carb

If you live in an area that requires smog inspection and you plan to drive the car on the street, forget it. You won't pass the smog test.

If you have no smog inspections or it is a track only race car, do a search in this forum. The subject has been beat to death.
 
If it's only 1/2 done, try and make it back into an EFI car.
Stock EFI parts are dirt cheap, even free sometimes. It will run better, especially during a detroit winter.