Mister Jew

Sup,
I did a search but, didnt really find any info i needed. I just bought a clean eg pretty cheap and the motor is knocking which is fine but i just wanted to narrow down the possible problems. It sounds just like when you have a bad axle but it does it at idle and when driving. I only drove it around the block but it drives fine. What do you guys think it is? I was gonna go get a new set of bearings and maybe take the crank out if it needs it to get polished or, i was thinking about just gettin a new block so Any info would be appreciated thanx in advance peace.