On my old 73 dart I was runing a wieand tunnel ram on my 440 and was using 2 650DP with the pro form mainbodys added. On 93 pump gas my best time was 10.49 in the 1/4. At the time I had the wrong converter in it.
But I agree if the op has the 600 might as well use them. Just like everything Elese it's just going to take tuning and time