i talked to intense and zzp and both tell me that the 1.9 rockers are for the series 2 only. right now im doing some research on trying other roller rocker arms and seeing if they will work. the only problem i have seen so far in the rockers that im looking into is the clearance with the valve cover. the rockers that im looking into are the ford 5.0 pedestal mount rockers, they also come in 1.7 ratio. CRANE cams sells a set of alum roller rockers in 1.7 pedestal mount for like 200 bux. im also trying to get someone to fab a set of alum valve covers for our cars. from my checking, series 1 and series 2 valve covers are the same, im going to be replacing my rockers this week with a set of 93 roller fulcrum rockers and small block chevy valve springs, i have a friend that is bigtime into fords and he is getting me a pedestal mount ford rocker arm so i can check this out when i do it. i will post as soon as i do this. series 1 owners are basiclly on their own when it comes to mods. we have to do the R&D