Sam if you mill a 400 crank down that far it will break under the stress, This is a proven fact :!: I think i know where you got your info but a milled 400 crank in a 350 block just can't stand the stress, You have alot of racers on here that i would think they have tried it,They have some high dollar machines i would think they do know what they are talking about :!: Like i have said before ''God gave us two ear's and one mouth for a reason'' :!: :!:
Mark