Ukraine restarting T-64-based IFV development

[Penguin]

with Ukrainian firms not known for building tracked IFVs, converting T-64s to heavy IFVs would potentially be a relatively quick way of bringing more tracked IFVs into service.

I beg your pardon?

These have been around for years!

The BMT-72 is based on the T-72 MBT and is actually a comprehensive upgrade of the latter.
The unique compact design of the Ukrainian-developed tank diesel engines made it possible not only to considerably increase the power capabilities of the vehicle, but also to introduce into the vehicle design a new compartment, viz. troop compartment. The troop compartment is located between the fighting compartment and the power pack compartment.

http://www.morozovkmdb.com/eng/body/bmt72.php

The BTMP-84 is based on the chassis of the T-84 main battle tank. This retains the two-person turret armed with a 125mm gun fed by an automatic loader. The specific feature of the vehicle design is that there is a troop compartment for five infantry soldiers. A door at the rear of the vehicle opens to the left, steps fold downwards and the hatch above this is raised to allow the troops to rapidly leave the vehicle. A firing port is provided in either side of the troop compartment, as are roof hatches.

http://www.morozovkmdb.com/eng/body/btmp.php