I'm rebuilding my 430-4 and I want to know what I must do in order to run unleaded fuel, Valve seats, piston rings. Any help? :Comp:
Alot of guys worry for nothing about this. Buick blocks and heads have more nickle content, so valve recession isn't as much of a problem. There are plenty of lead substitutes on the market, Red Line makes a good one. Valve recession only becomes a problem when you are running high load/high RPM for reletively long periods of time. That's not normal street driving. Even a little race gas once and awhile will help. Putting in hardened seats is more dangerous, and an unnecessary expense IMHO.
