Anyone out there I'm restoring a 70 340 duster,Putting in a 2006 Hemi 5.7 with a carb and intake manifold should I wire the car with a painless kit or buy the O.E.M harnesses I have to add a electric fuel pump for the motor anyway and a electric fan

2007 Ram 2500 Cummins 2008 Dodge Nitro 1970 340 Valiant Duster