I think with cost in mind, the Speedmasters are the most cost effectiv option.
This Cam is a wonderful choice for Street use.
I drove this cam in a 340 with the RHS Steel Heads. That was really amazing.
Nice builds here.
On my Valiant with B Engine, the only Plug i hate to change is no. 6.
I drilled a "service hole" in the Fender to reach it. But its just because i used B-Body Headers and that thing is routing direct in front of the plug.
All others are easy.