Will a 440 big block fit in 1995 jeep Cherokee sport?

No, a 440 big-block Mopar engine will *not* fit in a 1995 Jeep Cherokee Sport without extremely extensive and custom fabrication. The engine is simply too large and heavy for the Cherokee's engine bay. You'd need to modify or replace virtually everything – firewall, inner fenders, possibly the frame itself – to even begin to consider it. The project would be a massive undertaking, far beyond a simple engine swap.