The IDF has a long and hilarious history of taking captured Russian armor and turning them into superheavy personnel carriers -- pic related used to be a T-54, and is seeing service right now. This worked well enough that they recently started turning the Markava into the Namer. But they never fought the Arabs after the T-72 became available, so the poor old T-72 never got its chance to shine.
Let's suppose your state guard or local sheriff spends $50K on a T-72 and has it shipped in, on the grounds that the MRAP sucks ass, has too high a surface pressure, and cost $300K+. He puts you in charge of converting it into a personnel carrier of some sort. How would you do it?