You dont need it, unless as stated above, your working the motor extremely hard constantly or you plan on running a large amount of horsepower through the engine, in which case you probably have it torn apart and why not add hardened seats to the list?
Theres plenty of vehicles still on the road that were built with leaded gas in mind. If it makes you feel better it certainly couldnt hurt anything.
But after 55 years of abuse, I think my old 216 will speak for herself. She still runs great.
Jeff
