Turbo head build

I have decied to not do anything with the cam right now as that would bea. lot more work. Curently my plan is to go with 318 valve springs and stock valves that are back-faced. Where is a good suplyer to get 318 springs and retainers from.

I am also planing to get head studs from ARP.
DODGE ARP 142-4001 ARP Pro Series Cylinder Head Studs | Summit Racing
I would go with the Comp 901 springs if it was me.