Heli-Lift is now in. The following helicopters can lift:

AH6X_DZ
MH6J_DZ
UH1H_DZE
UH1H_DZ
UH1Y_DZE
UH1Y_DZ
UH60M_EP1_DZE
UH60M_EP1_DZ
BAF_Merlin_DZE
BAF_Merlin_HC3_D
MH60S
MH60S_DZE
CH_47F_EP1_DZ
CH_47F_EP1_DZE
Mi17_Civilian_DZ
Mi17_DZ
Mi17_DZE
MV22_DZ

To see what they can lift, find the heli name on the left the look at the code that follows:
pastebin.com/pJA9Vb5C

"Land" means everything in this list:
community.bistudio.com/wiki/ArmA_2:_CfgV...#Land_Class_Vehicles

To use, get in a heli that allows lifting, roll your mousewheel and switch the HUD on. (Red text.) Hover your chopper low over the vehicle and new text will appear informing you that the lift if possible. Mouse-wheel click to lift.

Locked vehicles shouldn't be liftable but I spawned a locked vehicle using the admin tools and it let me lift until I locked then unlocked the car. Your mileage may vary.
All vehicles have a unique so if I spot any of you stealing locked cars I'll simply ban you.

Post (SENSIBLE) bugs/suggestions here.

UPDATE:
Looks like Epoch might be using it's own class system for Land/Air/Sea etc.
github.com/vbawol/DayZ-Epoch/blob/master...figs/cfgVehicles.hpp

Good job with the heli lifting. Never used one that had a HUD...much easier to lift without having to A: Struggle like hell and look drunk whilst trying to get near where I thought the vehicle was and B: Cheat and use 3rd person, which feels wrong....

Had a play around with it today and it all seems good....terrifying the first time you drop a vehicle and watch it fall, expecting the explosion. But, all really well done