will vn s1 heads fit vp s2 motor. also what are fe2 springs.
Yes they will fit, but need the PCV holes drilled before you fit them...
The PCV hole is (from memory?) about a 5/8th hole - you can work out where it goes by positioning a new inlet manifold gasket on the head before drilling.
FE2 is Holdens name for the optional suspension upgrade that some of the vehicles get (slightly lower ride height and slightly stiffer).