really want these harland sharp roller rockers. part number S401196A. Summit racing had them listed as a 1.6 ratio. Harland sharp had them listed as a 1.8 ratio and just the regular S401196 without the "A" at the end as the 1.6 ratio. Emailed them both. summit said "oops the S401196A's are really 1.8 we will update our site". Harland sharp said "oops the S401196A's are really 1.6 we have to fix our site" harland sharp also said you cant have a higher ratio without modifying the head which i know is not true. so I still dont know what the real ratio is.....1.8 would be sweet.