[techinspector1]

I'm beginning to develop an interest in the Pontiac......
14 degree valve angle compared to the SBC 23 degree angle....
A 389 is bigger than a 383.....:thumbup:

 

[techinspector1]

BTW those tri-powered Pontiacs sound and look incredible.

I know. In 1966, my friend let me drive his brand-new GTO 389 tri-power 4-speed. It's as close as I ever got to a handful of car back in those days......too busy paying for a house and raising kids.