Under my watch, I have heard no pinging. I always run name brand 93 octane.
It isn't normal for bearings to wear down after 33 to 43 years?
Stock pistons? We suspect the engine is 30 over already, based on the fact that a machine shop must have rebuilt it in 1978... Are you certain they are stock? Are they compatible with a 30 over (406 CID I think?)?
Is it normal for the pistons to have such a collection of carbon or whatever on the top?
Thanks!
1968 Firebird 400 Convertible Original: Engine, Intake manifold, Heads, Body, Stereo, 3.08. THM400. Engine rebuilt by Ken Keefer early 2012. New: Holley 4bbl 670 HP, hidden iPod setup, RobbMC mini starter, A/C, front disc brakes
