Not orginal. But sat for 30+ years before I got it. I did a very thorough vinegar flush before I ever got it running. Last coolant change/flush was 3 years ago. But I had a bad rad cap somewhere in between. I think that contributed to the rusty mess I had this go round. Air in the system.
Gonna try to be better at changing coolant (I use the old style green stuff) every 2nd year.
