Gn1 rockers on ta heads

[434nova]

Does anyone know if rockers from gn1 heads would work on a set of ta heads ? The champion gn1 heads are aluminum. Thanks

 

[Ttype6]

They're not proper for either head. You need to use the T&D rocker assemblies for The TA SI heads on either head. They use wider rocker arm bodies that allow the push rods to remain centered in their respective push rod holes. At the same time,because the rocker bodies are wider than the stock rocker bodies use in the T&D assemblies made for the GN1 heads,there is room to move the rollers over so they are centered over their respective valve stems. Since the GN1 rocker assemblies use the same width rocker bodies as the T&D rocker assemblies for iron heads,you have to move the rockers toward the valve stems with different shims and modified/shortened spacing tubes when using them on either head because both heads use larger diameter valves which necessitates moving them away from each other. If you move the rockers over until their push rods rub on the sides of the push rod holes,the rollers still won't be centered over their respective valve stems.