Any 10 second "All Throttle" 318's in door cars ?

I don't really get the cost and hardness factor, most 408 builds are stock block and aftermarket everything else and a similar 360 build might use stock crank too, other than possible piston cost,
What so difficult and or more expensive for the parts for a 318 build ?
Pistons are the only expensive cost factor next to the cylinder head you want to run ether OOTB or ported.