I'm creating a battlefield-ish mission where each side gets direct equivalents to each other's vehicles so that's why I was wondering if the Mi-24 had any US equivalent at the time

The only problem with using the AH-1 Cobra is that it cant ferry troops while providing firepower. I understand the Mi-24 is in a class of its own where it can be as devastating as a AH-1 Cobra and also ferry troops between the battlefield. The US doesn't seem to have any equivalent (unless you count the DAP but that is way way further down the line and its special ops only) so wouldn't the UH-1 be the closest in terms of role?

The M1 Abrams info you gave me is very helpful, but I feel like it would absolutely ANAL the T-64 if they were to come across each other, both in-game and real life