s/6 to small block

On WeD. im picking upa 67 fastback barracuda with a /6,and swaping my 360 from my duster in to the cuda. I DONT HAVE TO SWITCH WIRING HARNESSES DO I?. . .i did this swap before in a 70 dart, but only got the car to crank then the, then the starter froze on us then car car got sold before we got to try again. so can i use the /6 harness for the 360??