Change advance curve or less timing.....36 total is a bit much for todays fuels in a 289 IMO....when does it currently come in, rpm-wise?
Increase octane rating of fuel by adding octane booster or racing gas..
Carb is likely fine...plug readings?
Valve adjustment is definitely not cause....
Get back to us...
Increase octane rating of fuel by adding octane booster or racing gas..
Carb is likely fine...plug readings?
Valve adjustment is definitely not cause....
Get back to us...