The heads come equipped with dual springs and lightweight retainers. Before they are reinstalled, Ben double-checks to make sure the springs' tension is correct. | 
Although the heads come pre-assembled, Ben Smeding takes the time to tear apart each head and re-assemble it, that way he knows every thing is kosher. Here Ben is reinstalling the 2.02-inch/1.60-inch stainless steel valves that utilize undercut stems for more flow. | 
The intake port entries and valve bowls are also CNC-machined for maximum flow. The heads are designed around Smeding's specs for the ultimate in performance, and overall street manners, much like many of their bottom-end components. |
With the heads back in action, they are torqued down to the block. | 
Continuing on, Ben dropped in the special length, hardened pushrods. | 
Rounding out the head assembly is the installation of the rocker arms. Smeding uses 1.5:1 ratio full roller rocker arms that are complete with extra large trunions. |
It certainly does suck ... air that is. This is exactly what the 383 Hot Rod motor wants to hear about its Edelbrock Performer EPS dual-plane manifold. | 
Combine the manifold with this Holley 650-cfm carburetor, equipped with vacuum secondary with electric choke, and the 383 is no longer the asthmatic kid in gym class. | 
With things reaching the homestretch, the harmonic balancer is installed... |