Necessary Additives vs. Unnecessary????

bigdoggeorge said
Don't laugh! I've got a '69 Valiant with a 170 CID 6 that I'm restoring to original condition. It only has 44k original miles on it. Anyone know if it was designed for leaded or unleaded fuel. I don't have an owners manual at this time so can't look it up.

Low-Lead started in 73 and No-Lead was a few yeas latter when catalytic convertors first started appearing. Prior to 73 all gas had lead in it.