I received my first parts in the mail recently and I have a lot more on the way:
Lightweight flywheel from a Suzuki G13 engine. Along with the clutch disk and pressure plate, the whole rotating assembly is 1.4 lbs lighter than the assembly from a G10 and it gives more clutch area for slower wear and a stronger feel.
Stainless Steel Engine fastener kit. Everything is there except the manifold studs. This doesn't really help economy, but it's a nice thing to have for my engine rebuild.