well i need to know what the difference is between the star shaped drive and the hex shaped drive. i have a 90 model roller block and it has a drive rod with the star shape on the distributor end and i have a block that is in my 89 lx and it had the hex shape. what is the explination on that please? is one HO and the other not? does it have to do with the FoMoCo block that is in my car? any help will do
chris
chris