The 454 HO characteristics an all-solid rotating assembly for excellent toughness and durability. It also employs a clean hydraulic roller camshaft for outstanding drivability as well as a broad overall performance selection. Hydraulic lifters ended up what was in mine when I re-designed the engine. Bored it out to 468, https://bookmark-group.com/story203049/not-known-factual-statements-about-454ss-for-sale