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I vote for the 850 dp. I had an 800 DP on a 440 with a 222 @.050 cam 3.23 stock converter, and at over 4200 lbs. It ran better than with my 3310 or 750 AFB.


With the 3.91's and converter I was thinking it could use 800cfm with the smaller diameter throttle bores(same as 750/less than 850)and still have decent part throttle response.
I will agree it is hard to beat a well tuned 750 vac sec on many applications(my 496 barge included).