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#42646 02/05/2004 10:50 PM | Joined: Oct 2001 Posts: 3,458 Extreme Gabster | | Extreme Gabster Joined: Oct 2001 Posts: 3,458 | Nice looking truck!
It will run the best on 87 octane unleaded gas. 93 is just asking for carbon in the combustion chambers. The engine doesn't have enough compression to run high octane gas. If it pings a bit adjust the timing or run 89 octane.
Depending on how long ago it was rebuilt, the engine may already have hardened seats. If there are enough miles on the head (like over 10k) the seats have probably work-hardened anyway. Either way you don't need lead additive. If the seats were not hardened you might as well wait until it needs a valve job to do it, since you will not ruin anything that way anyway.
Just keep the valves adjusted, maybe a bit on the loose side, and your valve train will outlast everything else.
As long as you keep the engine in tune and drive it often it will run well on just about any cheap gas you can find. It's not modern enough to worry about getting varnish in the fuel injection.
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