Lead Free Gas

[JD Baillie]

Hi Robert,
Truck has 7K original miles. I'm not sure how much I'll be driving yet. Took it on its first big trip in years today. Did OK .. a little shimmy at 40MPH and roaring like all beat to hell. But I don't think the engine has ever been rebuilt. I spoke with the first Civvie owner when I bought the truck and he said he didn't do much to it .. certainly nothing major. So it likely has the original stuff in the engine. Original owner drove it from northern Manitoba to Vancouver Is averaging 35MPH but comming down the Rockies he said he let her pin the speedometer... eeeeeeek! Oh well he survived to tell me about it and laugh.
Can you elaborate a little on what these 'hardened' parts are? .. Or what the process was and why it was used?

Rgds
JD