I have the heads off of a 292 that will be stored for some time. I have applied Marvel Mystery oil and the cylinder walls look good except for there is a spot at the top of one cylinder with a small bit of rust. My intention is to put the heads back on for storage.

Should the rust be treated with ospho or another converter; or?
Should water jackets be filled with an antifreeze solution as a rust inhibitor?
Any other preventative measures?





.150 Stroked Y-Block:327.25 ci @ >1hp per ci