On this 318 bracket engine I am building I am leaning towards an iron top ring sealed power ring set. I know the moly rings last longer, but don't they take longer to seat? This engine will only power the car to the strip and bracket race, so it doesn't have to last 100,000 miles. My planned 4.88 gear swap will kill its highway use!! I am using KB-399 pistons with 57cc chambers for 12:1 compression so it will be a 110 octane motor if that makes any difference.
