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Difference between HO and Non HO

2913 Views 9 Replies 4 Participants Last post by  25thfox
Just wanted to know if the only difference between the HO roller engine and the non HO roller engine was that the HO had forged pistons and the HO did not. Does anybody know is the block, crank and rods the same between the two of them. Is there any other differences. Please let me know if i am wrong. Thanks for any imput.
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h.o. motors had both forged and hyper pistons depending on the year. Non h.o. motors had flat tappets not rollers like H.o. motors had.
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