Back in the day, there was a drag racer RC Collins, and he ground the cams for mine, you have to use to cam cover gaskets and the inside of cam cover has been ground off some so the cams will turn without hitting the cam cover, ported head, welded crank, oil gate turned backwards because it took off so hard, we street raced these back in late 70’s. My brother had one the same color as yours. I have owned mine for 45 years.