470 Stroker - Anyone built one?

850 is way bigger than a 950. 950 will do the trick, Holley Ultra HP 950 is a sweet *** carb.
A Lunati 60313 will get you a solid 585/575 HP/TQ 470 with stage 2 ported RPM heads or some Victor with a stage 1 port job. Fully ported Victors with the std port and a Victor intake will get you around 650-660HP with the 60313 cam.