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What makes a VVT crank different from a non VVT?
What machining steps are required?



Timing gear is positioned further forward on the VVT crank. Would need to machine the crank snout to work in non VVT motor.



Does this also apply to 5.7 and 6.1?



No.
The only ones affected were the 6.4 and the 5.7 eagle head motors. 09 and up for the 5.7.
I think the 6.4 came out in 2011.