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Mod | | | Forums66 Topics128,072 Posts1,055,906 Members48,429 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
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| | | | Joined: Jan 2013 Posts: 31 New Guy | | New Guy Joined: Jan 2013 Posts: 31 | I am ready to fire up a 1957 235 in my 1951 1/2 ton pickup. I do not believe that the valve seats have been hardened. Should I use a lead additive in the gasoline? | | | | | Joined: Nov 2006 Posts: 2,544 Shop Shark | | Shop Shark Joined: Nov 2006 Posts: 2,544 | | | | | | Joined: Jan 2013 Posts: 31 New Guy | | New Guy Joined: Jan 2013 Posts: 31 | Are hardened valve seats a waste of money? | | | | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 |
As Don posted, neither hardened valve seats nor leaded gasoline are needed in a 216/235/261 engine, unless you are regularly running the engine at very high RPM for long periods.
Either would be waste of money.
High-compression, high-octane, muscle car era engines are another matter.
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