How to Megasquirt your 3G Hemi
The VVT is oil controlled. Hangs off the front of the cam. The lock out kit is ~$100 from comp cams.
The cam in the VVT motors has different dimensions than the non-VVT 5.7 & 6.1. You have to get a cam specific for that motor. I would recommend the comp cams offering or get a custom grind by a vendor.
Also, if you've got a 5.7, see if you can find a used 6.4 cam. Much cheaper (~$100 vs $1000), and is fairly aggressive. Lock it out and go.
I agree with Map- not sure how a locked out factory 5.7 VVT cam will perform. Though, A cammed 5.7 VVT motor locked out should perform no different than a cammed non-VVT 5.7.