I have a pretty good amount of rust inside my intake manifold that I have off the motor. Is there a good way to remove it? I bought CLR but want to know how to make the best use of it.

Brad
Sierra Vista Arizona
1954 Lincoln Capri

Find a pan/container that's just a bit larger than the manifold, and soak the manifold in a gallon of EVAPO-RUST for a couple of days. If necessary, rinse and repeat. It helps if you can seal the pan/container in which the manifold is soaking. Don't discard the used EVAPO-RUST; it can be reused. 

Sand blasting is the best way to get rid of all the rust and can be washed out easily afterwards.  I try to sand blast all iron intakes after porting them.  Do not use glass beads, those will imbed in metal when they crush with air pressure.  They will eventually wash out with the fuel and ruin your rings.  Some machine shops use steel shot for abrading the parts.  That also leaves little steel balls in the runners even after washing.  I have tried it all over the 50 years I have ported heads and intakes, and sand blasting and pressure washing afterwards is the best in my experience.  The sand leaves a rough surface which promotes keeping the fuel in suspension, and not washing down the port walls.  This applies to the Y Block intake iron intake manifolds.  If you sand blast another engine family intake that has a pan under the manifold, remove the pan before sandblasting.  Here is a SBF I did recently for a Cobra replica build.   Joe-JDC

JDC

Many years ago, a friend sandblasted his intake manifold. The result was the same that JDC experienced when using glass beads. If you use any abrasive media, I would make sure the manifold is thoroughly cleaned before and after using an abrasive.