Thanks, Bjorn ... your money will be in the bank on Monday.
Tom's right - get bigger valves and a longer duration cam, and all that detonation will go away ... far far away.
You don't need more compression ratio. On the contrary. You need to reduce the dynamic compression ratio with more cam duration, bigger valves, more intake and some better exhaust. Match the carb and distributor tuning to the combination, and your 350 will be far more fun than it is now, all on 91, 92 OR 93 octane.
The 350 HO cam is the 067 or 068. That's a good-sized cam for a 350, and can be picked up at places like Summit Racing as their part number SUM-K2801 for about $85 with lifters. Start there and let us know what you think.
