Info at this site might be helpful.
http://www.justanswer.com/questions/2zzo6-timing-a-1966-Pontiac-gto-389-with-tri-power-what-is-the-best
A direct bolt in, 1961 to 1965 389 ci, Pontiac including the Pontiac Tempest.
all pontiac engines were blueish green, never ever remember seeing any red engines, someone must have repainted it.
Factory stock ignition timing for the Corvette 327 ci 350 HP is 4 degrees BTDC.
6 degrees before top dead center
400 ci spark plug r-46ts spark plug gap .040 point dwell 28 to 32 point gap .016 ignition timing 12b fuel pump pressure 5 to 6 1/2 idle speed 650
compression ignition
compression ignition
1955
An SI engine ignites the fuel with a spark (SI = Spark Ignition) whereas the CI engine ignites the fuel with heat generated from compression (CI = compression ignition)
Combustion ignition engine
The CI stands for compression-ignition engine also known as a diesel engine. The CI engine is classified as an internal combustion engine.
Everything should bolt right up.