This is based upon the proviso that the original Author "StereotypicalBrit" expressed open permission on their last post on their mod thread that anyone could continue the work and there is no way to contact them as they have not been around since 2018. Link here
https://forum.kerbalspaceprogram.com/index.php?/topic/154792-122-mil-mi-24-hind-cockpit/&do=findComment&comment=3238081
If the Author resurfaces and and has issue they need only ask I will remove the mod from Spacedock.
This model comes in 2 sizes. Mk3 and Airplane Plus Mk3s1.5 form factor. It has been given Entry and exit points and ladder colliders. 2 nodes for the intakes and 2 very basic internals, 1 for each size.
An example craft can be found in the SPH folder inside the main folder. It requires Airplane Plus and Breaking Ground to work.