help for valve spring on my gt40 heads

[stanGRR]

what kind of valve spring and roller rockers need to upgrade for my gt40 heads with a b303 ford racing cam?

 

[rd]

Not sure about that cam, but I have Comp 972 springs on my iron GT 40 heads. With a .464 lift flat tappet hydraulic cam they work fine.

 

[Mustang5L5]

B303 has pretty low lift

Trick flow has a kit that is complete and should handle a B303 easily