I have a heads and cam 383 Sbc. With an 850 deamon carb. I've had the engine dyno tuned at a shop a couple years ago but it had a holley 750 in it at the time. And they suggested having it at 35* at full advance.

The engine ran in a camaro for a while with the holley 750 but it had a bronze distributor gear and got worn down and couldn't hold timing. I ran out of money and it set for a couple years. I got the money to fix it finally and I bumped up to an 850 cfm. I pulled the distributor changed the gear and set the timing at 35*. When I take it out on the freeway it detonates under load and pings every once in a while at idle.

I've tried 34*, 35*, and 36*. But it still does it. Do ya'll have any idea what might be causing this? Do you think the bigger carb has something to do with it? And I forgot to say the 850 came off a stock zz4 572. And I haven't changed the jets yet.