3406b bad motor- how to clean air to air and intake piping

So I bought a pete (1992) with a motor knock in it. 3406 b, air to air, spacer plate motor, no jakes, supposed to be 425 but no tag on engine.

Dropped pan and one piston has been replaced, and sleeve. The other pistons are looose in the sleeves. Practically fall. I think the knock was actually a piston rocking in a sleeve after it warmed up.

We pulled intake piping, and its full of fine dust/rust/ maybe feed mill dust or clay from a end dump trailer. I'm thinking they ruined a air...

3406b bad motor- how to clean air to air and intake piping

3406b bad motor- how to clean air to air and intake piping