I guess i will be the oddball one. I will be using 2 carter comp 750 carbs on my 440.I know everybody does not like them. but i went 10.50 at 127 in my old 3500 pound 11.1 compression 440 powered 65 Plymouth and they were box stock.I would love to try some 750 dp on my car but i don't have the money to switch everything over to Holley. I say if you already have the 660 to give them a try. best of luck Mopar65