Hey guys, Can anyone give me a part number for the Isky double valve springs? I have a friend here who wants to put them in his YB head but isn't sure which one it is. Before I get recommendations for the other brands, We're in the US so the Isky's are already here and easier and less costly for him to get. So if any of the engine builders/tuners/shop owners know the part number can you please let me know.
Thanks,