Stock engine block freeze plugs?

When Mopar put their engines together did they use brass or steel freeze plugs?

Just steel unless they went to brass as of late.

Thanks,so they might have gone to brass in the later models?

That I don't know, but some later GM stuff has brass.

Steel in '87, once passed on a car with one rusted out behind the flexplate. My free '87 318 is also steel, they're coming out.

R.

AFAIK,
No brass plugs in a mopar of any year as factory installed