I went the other way. I thought the 650/Strip Dominator had more low end and I didnt think the top end lost any. I had 2 390's on my 340 (then went to a single 4bbl top, maybe that killed the ram effect?): 284/.484 cam MP 175K convertor, 3.91 SG. Only response I got on my STR was "why did this guy put a Chevy motor in this Mopar?".... dumb *****.......