Yes it will pretty much drop in. The second step on the hammer will probably have to be filed deeper since the NV uses the thicker transfer bar.
The next check after you cut the second step deep enough to do away with the transfer bar pinch is to open the loading gate and count the clicks. 6 and you are good to go, 12 clicks and you will have to remove some from the top of the hammer to let it sit deeper when at rest. The 12 clicks are 6 from the pawl, and 6 from the plunger that aligns the chambers with the loading gate. The NV is designed to retract the pawl when the hammer is at rest(freespin pawl basically), so the hammer may need to sit deeper to contact the base of the pawl and retract it. Then you will only have "clicks" from the plunger when the chambers are aligned.